NEW PRODUCTS--Roundup of the latest audio equipment and accessories (with ads)
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Dynaco's 100-watt-per-channel power amplifier
As part of its 2500 series of low-silhouette assembled components, Dynaco has introduced a 100-watt-per-channel power amplifier, the Model 2521. The amplifier utilizes full complementary-symmetry driver and output stages and a current-mirror input stage, which are said to reduce psychoacoustically irritating distortion. Harmonic distortion is 0.05 percent or less, and intermodulation distortion is below 0.02 percent. A peak-reading LED display with a 33-dB range and three front-panel, switchable power levels (0, -6, and -12 dB) monitors the power-output level, and three additional lamps indicate overheating, power on, and initial turn-on delay conditions. The 2521 is supplied with a pewter-tone front plate and is directly rack-mountable. A multi-tapped transformer permits use with both 120- and 240-volt lines. The amplifier is therefore us able throughout the world. Dimensions are 19 x 5 1/4 x 14 1/4 inches. Price: $599.
Slimline Two-head, Front-load Cassette Deck from Nakamichi
Nakamichi Research has introduced a dual-capstan three-motor cassette deck, the Model 580, based upon a number of design approaches said to be new to tape-recorder technology. The deck utilizes the same narrow-gap record/playback head as the company's Model 600 recorder; however, a new type of toroidal-coil erase head is used in the 580. Nakamichi claims that the more complete erasure (greater than -60 dB at 1 kHz) achieved by this head results in greater subjective definition on musical passages.
The tape transport of the 580 is fully logic controlled and has three motors: a d.c. servomotor for recording and playback, a high speed motor for fast-winding functions, and a third motor to align and control the action of the head assembly. The transport also has a cue-and-review function that lets the playback head remain in contact with the tape during fast-forward and rewind so as to assist the listener in finding a particular selection. Special plastics and alloys are used extensively in the transport of the 580 in order to reduce the wow and flutter and modulation noise said to be introduced by vibrational resonances of transport components. Weighted rms wow and flutter is claimed to be below 0.05 percent. Frequency response is rated as 20 to 20,000 Hz ±3 dB at a-20-dB record level.
The signal-to-noise ratio with Nakamichi EX-II tape is better than 60 dB relative to 0 VU.
Other features of the 580 include peak-reading meters, memory and timer functions, a switchable FM-multiplex filter, and front-panel record-level and bias controls for each of the two tape-format positions. A standard cable-connected remote control, the RM-10 ($60), and a wireless infrared-beam remote control, the RMA-580 ($155), are available as options. The 580 deck is approximately 19 3/4 x 5 1/2 x 13-43 inches. Price: $650.
Fisher Cassette Deck with Remote Recording Control
Fisher is now including on three of its cassette decks a hand-held wireless remote control that activates a solenoid to stop and start tape motion and recording function. Among the units incorporating this feature is the CR5125, a three-head unit that also includes Dolby noise reduction. The tape transport is a dual-motor, dual-capstan arrangement con trolled by touch-keys that operate electronic solenoids. Front-panel controls are provided for monitoring, and there are bias and equalization settings for three different tape types.
The Dolby circuits can be used for both tape and FM. Frequency response is 30 to 15,000 Hz ± 3 dB with normal tape, extended to 18,000 Hz with CrO2 tape. Signal-to-noise ratio is 64 dB with Dolby, and wow and flutter are rated at 0.04 percent (weighted rms). Total harmonic distortion is 1.4 percent and channel separation is 40 dB. The unit measures 17 1/2 x 12 1/4 x 4 3/4 inches and weighs 22 1/2 pounds. Price: $550.
Maxell has announced improvements in their LN and UD tape cassettes. The LN line benefits from a new manufacturing technique that makes possible a higher particle-packing density and a smoother tape surface, with a resultant 3-dB wider dynamic range and an in crease of 2 dB in high-frequency response (relative to the current LN cassettes) as well as superior bass response and reduced tape noise. The Maxell UD tapes have also been upgraded by more homogeneous dispersion and improved orientation of the magnetic material, resulting in a dynamic-range in crease of 2 dB as well as lower modulation and tape noise. Maxell states that prices have not been increased. Representative prices are: LN-60 and LN-90, $2.55 and $3.90, respectively; UD-60 and UD-90, $3.80 and $5.70, respectively.
Osawa Wall-mount Speaker Brackets
Osawa has introduced the AVF Universal Wall Bracket, a device designed to mount speakers on any wall-so long as the speakers weigh no more than 30 pounds and have depth dimensions of 9 to 14 inches. An adjustable padded clamp is used to hold the speaker; no mounting holes in the cabinet are necessary. The stands swivel both horizontally and vertically for alignment purposes. Price: approximately $40 per pair.
Realistic Optimus-10 Speaker System Stresses Efficiency
Latest among Radio Shack's Realistic loudspeaker systems is the Optimus-10, with a driver complement consisting of an 8-inch woofer and 3 1/4-inch tweeter, plus a 10-inch passive radiator. The Optimus-10 delivers a sound-pressure level of 90 dB at one meter with a 1-watt input. Frequency response is 42 to 20,000 Hz ±3 dB, power-handling capacity is 75 watts of continuous program material, and impedance is 8 ohms. Both phono-jack and screw terminal inputs are provided, and there is a continuously variable tweeter-level control. Finished in walnut veneer with re movable grille, the system measures 25 x 15 1/4 x 10 5/8 inches and weighs 32 1/2 pounds. Price: $139.95.
Yamaha Amplifier Is Disc-oriented
Yamaha's A-1 is a 70-watt-per-channel integrated amplifier designed primarily for use with turntables. It has adjustable phono-input resistance and capacitance on both its moving-coil and conventional phono inputs, as well as a switch designed to bypass all post phono sections when the unit is in the phono mode. Except for this "direct coupling" switch, power-on and speaker switches, and the volume knob, the amplifier's controls are concealed in a recessed panel under a pivoting front plate. These additional controls include inputs for one tuner, one auxiliary source, and one turntable, a single tape-monitor circuit, and defeatable stepped tone controls. In the direct-coupling position the amplifier is fully d.c. coupled.
The A-1 is rated for less than 0.02 percent total harmonic distortion at rated output; intermodulation distortion is less than 0.003 percent. The moving-coil phono stage will not overload on signals of less than 6 millivolts, and the signal-to-noise ratio (S/N) is 82 dB.
The conventional phono stage overloads at 230 millivolts and has a S/N of 97 dB (as measured with IHF A weighting referenced to 10 millivolts, input shorted). Frequency response for the phono sections is accurate within ±0.2 dB. Dimensions are 17 1/4, x 4 3/4 x 15 inches. Price: $595.
Ribbon Tweeter From Pyramid
The Pyramid Loudspeaker Corporation's Model T-1 add-on tweeter is intended to supplement existing high-quality loudspeaker systems by improving high-frequency performance. A ribbon device incorporating a 5-pound magnet assembly and a special cross over network acting at 3,000 Hz, the T-1 can be hooked up directly across the terminals of any full-range speaker system. The ribbon of the T-1 has an area of just over 2 3/4 square inches. At 10,000 Hz, response is within 3 dB of on-axis output for vertical angles as much as 90 degrees off axis and lateral angles as much as 160 degrees off axis. A five-position, 2-dB-per-step attenuator is built in. Frequency response is 3,000 to 40,000 Hz ±3 dB (±4 dB to 100,000 Hz). The T-1 provides a sound-pressure level of 93 dB at 1 meter with an input of I watt of pink noise; maximum peak-power input is 200 watts of pink noise.
At 20,000 Hz, impedance is 12 ohms. Rise time is less than 5 microseconds. Finished in brushed black anodized aluminum, the T-1 measures 4 3/4 x 7-3/4 x 4 3/4 inches and weighs 8 1/2 pounds. Price: $990 per pair.
As part of its new solid-state line, Audio Research Corporation has introduced the D-52 power amplifier unit rated at a minimum of 50 watts per channel (both channels driven) at 8 ohms from 1 to 20,000 Hz with less than 0.25 percent total harmonic distortion. Located within the unit is a switch for "bridged" monaural-mode operation; at this setting the D-52 provides approximately 180 watts into 8 ohms. Intermodulation distortion is less than 0.1 percent at rated output, and noise is more than 90 dB below 50 watts at 8 ohms. Input sensitivity is 1.1 volts for full output, and in put impedance is 30,000 ohms. Industrial-grade components and construction are employed. The D-52 measures 19 x 5 1/4 x 10 1/2 inches and weighs 39 pounds. Price: $995.
JVC Preamplifier Emphasizes Phono Functions
The new Model EQ-7070 aims at providing maximum flexibility for all types of phono in puts including moving-coil cartridges, for which a low-noise pre-preamplifier is built in.
A front-panel rotary switch selects any of five phono inputs, including two moving-coil in puts of high and low sensitivity. Two more rotary switches establish resistive (100, 33k, 50k, and 100k ohms) and capacitive (100, 220, 330, and 470 picofarads) loads for all three of the conventional phono inputs. There are also inputs for tuner and auxiliary program sources, tape-monitoring facilities for two tape decks, and an audio-muting function that reduces the listening level by 20 dB for brief interruptions such as telephone calls. The low-silhouette cabinet of the EQ-7070 has a comprehensive block diagram printed on its top plate to identify internal signal paths and switching functions. Low-noise field-effect transistors are used extensively in the preamplifier's input stages.
Harmonic distortion of the EQ-7070 is rated at 0.002 percent for the conventional phono inputs and from 0.003 to 0.005 percent for the two moving-coal phono inputs. Signal-to-noise ratios are 82 dB for the high-sensitivity moving-coil input, 73 dB for the low-sensitivity in put, and 85 dB for the conventional inputs, all A-weighted. Impedances of the moving-coil inputs are 11 and 25 ohms, respectively. The conventional phono inputs have an overload point of 300 millivolts at 1,000 Hz. The EQ-7070 measures approximately 16 1/2 x 2 1/2 x 15 inches. Price: $950.
BSR Unit for Remote Control of Household Lights, Appliances
The X-10 from BSR is a system that permits control, through special microprocessors, of any lights and appliances in one's home from any point in the home. Pushbuttons on the Command Console control, directly through the house a.c. wiring, up to six teen remote modules that plug in between the individual lamps (which may be dimmed as well as switched) or appliances and their respective a.c. outlets. Remote modules are also available to replace existing wall switches. The control unit might be kept at the owner's bedside. In addition to individual controls, a special pushbutton is included to turn on all the lights at once (as well as audio systems or alarms) to frighten off prowlers.
Besides the Command Console, smaller units are available to operate the console ultrasonically at distances of up to about 30 feet. The Command Console measures 4 3/4 x 3 1/2 x 2 1/4 inches and weighs 8 1/2 ounces; its price is less than $40. The ultrasonic control unit is under $20, the remote modules less than $15 each.
"Speaker UPPERS" are adjustable walnut stands that elevate any loudspeaker of 150 pounds or less to a position 10 inches above the floor. They are intended to isolate the speaker from floor and wall mechanically (thus reducing the chance of its exciting resonances in those surfaces) and to improve stereo imaging and dispersion by raising the speaker to a position close to the level of the listener's ears. Felt discs protect the speaker's finish from abrasion. The stands expand to a maximum of 11 1/2 by 18 inches, though speakers of larger dimensions can be accommodated. Price: $19.95 postpaid from SpeakerUPPERS, P.O. Box 698, Malibu, Calif. 90265.
The highest-power AM/FM receiver from NAD (New Acoustic Dimension), the 7080, has a maximum output of 90 watts per channel at a rated harmonic and intermodulation distortion of 0.03 percent. Many of the design criteria for the 7080 and the other NAD receivers and amplifiers are said to have been derived from recent studies of transient forms of distortion and preamplifier/phono-cartridge interaction.
The 7080 incorporates two phono inputs that will not overload with signals of up to 200 millivolts; phono signal-to-noise ratio is 75 dB. The signal-to-noise ratio of the high-level inputs is 95 dB or greater. The front panel has variable-turnover-point bass and treble controls (250 and 500 Hz for bass, 2,500 and 5,000 Hz for treble), a high filter acting at 8,000 Hz with a 12-dB-per-octave slope, and an infra sonic filter rolling off at 12 dB per octave be low 18 Hz. Frequency response of the phono section is accurate to within 0.03 dB. The tuner portion of the receiver utilizes a phase-locked-loop multiplex section and has a us able sensitivity of 1.8 microvolts, a 50-dB quieting sensitivity of 35 microvolts in stereo, and total harmonic distortion in stereo of 0.3 percent or less. Alternate-channel selectivity is 70 dB, capture ratio 1 dB, and image rejection 70 dB. Signal-strength and channel-center meters are used to tune stations.
Switching for two pairs of loudspeakers, an FM interstation-noise muting switch, a micro phone and two headphone jacks, and two tape-monitor/dubbing controls are on the front panel; the unit is finished in a dark bronze. Dimensions are approximately 19 1/2 x 6 x 1414 inches and weight is 42 pounds. Price: $590.
Latest Heathkit Electronics Catalog
The Christmas 1978 Heath catalog of electronic kits and supplies includes such products of interest to the audio enthusiast as a dynamic-range compression/expansion unit, the Modulus series of separate components, and a new coherent-phase speaker system. The catalog is available at no charge from: Heath Company, Department SR, Benton Harbor, Mich. 49022.
TDK Cassette Recording Guide
TDK's newly published Guide to Cassettes and Recording is a forty-eight-page booklet that presents in simple language some advice for the home recordist who wants to make optimum use of his cassette deck. A number of subjects are covered, from what constitutes a good recording to how to make one. A glossary of terms is included, as well as instructions for properly utilizing the deck's meters and keeping a unit in top operating condition. The booklet is available from TDK tape dealers for $2.95.
Tandberg's 80-watt Flagship Receiver
The Tandberg TR-2080 AM/FM receiver heads up their new 2000 series. It has a power output of 80 watts per channel with maximum harmonic- and intermodulation-distortion figures of 0.05 percent (FTC ratings). All signal sources are switched electronically rather than mechanically, an arrangement said to re duce the distortion and noise generated by conventional long wiring runs. The electronic switching system also permits the listener to cue and fade between the two phono inputs.
The tape-monitor circuitry of the 2080 accommodates two tape recorders, with facilities for dubbing while listening to a third source.
Tape-monitor 2 may also be routed through the tonal-compensation circuits of the 2080's preamplifier in order to equalize a signal to be taped. The tone controls include bass, mid range, and treble, centered at 50, 1,000, and 10,000 Hz, respectively; a low filter, which rolls off signals at 12 dB/octave below 30 Hz; and two high filters, which roll off signals above 8,000 (6 dB/octave) or 9,000 Hz (12 dB/ octave). The two high filters may be used simultaneously to achieve an attenuation of 18 dB/octave above 7,000 Hz.
Phono-overload levels of the two phono in puts are 120 and 150 mV (at 1,000 Hz), and IHF A-weighted signal-to-noise ratios are 88 and 79 dB. RIAA accuracy is 10.3 dB. Tuner specifications of the 2080 include an IHF sensitivity of 1.7 uV (9.8 dBf), a 50-dB stereo quieting sensitivity at 32 uV (35 dBf), and broadband stereo-FM distortion figures no greater than 0.5 percent. Capture ratio is 0.9 dB, and alternate-channel selectivity is 80 dB or greater. Additional front-panel controls include switchable FM de-emphasis and a switch that converts the FM relative-signal-strength meter to a power-level meter. Dimensions (in supplied rosewood cabinet) are approximately 20 1/2 x 6 x 14 inches. Weight is 27 pounds. Price: $1,200.
"Facial Treatment" For Records
Similar in approach to some peel-off skin cleansers is the new Disco Film, a record-care product from Empire Scientific Corporation. Supplied in plastic bottles with sponge tops, the Disco Film gel is sponged onto the disc and allowed to dry. It is then peeled off, taking with it all dirt and even, it is claimed, the residue left by some other record cleaners. The gel is water soluble and said to be harm less to records and skin. A container adequate for cleaning up to seventy vinyl LP sides sells for $29.95.
NOTICE: All product descriptions and specifications quoted in these columns are based on materials supplied by the manufacturer.
Recent fluctuations in the value of the dollar will have an effect on the price of merchandise imported into this country. Please be aware that the prices quoted in this issue may be subject to change.
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ADs:
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THERE ARE A LOT OF WAYS TO BUILD A RECEIVER THAT SELLS FOR UNDER $400. PIONEER DID IT THE RIGHT WAY.
INTRODUCING THE SX-780.
It seems that our competitors think they've mastered the art of building a moderately priced receiver.
Unfortunately, most of them appear to be the work of cost reduction engineers, rather than high fidelity engineers. People whose jobs depend on the cost of what goes into a receiver, not the sound that comes out of it.
At Pioneer, on the other hand, we build a receiver that sells for under $400 with the same care given to a receiver that sells for over $1000.
A perfect example is the SX-780.
It offers the kind of features, value and sound you won't find in any other comparably priced receiver.
A STRONG CASE FOR THE METAL BOTTOM.
If you turn over our SX-780, for instance, you'll notice the bottom is made of heavy gauge metal. It's designed to shield the tuning section from spurious noise and keep CB interference from getting in the way of your music.
Equally important is the fact that our bottom has a special ventilating system that allows air to circulate freely around the heat sinks. This not only reduces FM drift due to over heated tuning elements, but increases the life expectancy of the circuitry.
--- Metal shields our SX-780 from spurious noise.
A DC AMPLIFIER WITH THE POWER TO ELIMINATE DISTORTION.
The SX-780 features the same DC power configuration found in today's most expensive receivers.
It provides cleaner sound and richer, more natural bass because it eliminates feedback and something called TIM (transient intermodulation). Transient intermodulation is a form of distortion that can keep you from hearing the subtle overtones in your music.
Which interestingly enough is why receivers with a conventional power amplifier might possibly be able to match the specs of the SX-780, but never the sound.
A PILOT SIGNAL CANCELING SYSTEM THAT'S UNHEARD OF IN THIS PRICE RANGE.
All stereo FM stations in America broadcast their music over a pilot signal of 19,000 hertz.
If not eliminated, this signal tends to create an extremely high pitched sound ...
---- DC power supply found on the most expensive receivers.
... when combined with lower audible frequencies, Most of our competitors use a standard high band filter to cancel out this signal. Unfortunately, it also cancels out some of the music.
Pioneer created a special integrated circuit that eliminates this pilot signal without affecting the music.
Which means that you're assured of hearing everything the musicians had intended you to hear. Nothing more. And nothing less.
Obviously, the SX-780 is the only receiver that gives you this feature in this price range. The others give you the noise.
An accurate picture of what you're listening to.
WATTAGE METERS THAT LET YOU SEE WHAT YOU'RE HEARING.
When a receiver has wattage meters, it lets ...
--- A pilot signal canceling circuit that lets you hear only music and nothing more.
... you see exactly how much power is going through your speakers. So that it not only helps prevent unnecessary damage due to overloading, it helps you make cleaner FM recordings.
Of course, the SX-780 has other virtues conspicuously absent from our competitors' models. Like a built-in wood grain cabinet. Which is something others give you the option of paying extra for.
But what really separates Pioneer's SX-780 from others is more than just a matter of wood cabinets, wattage meters, metal bottoms, DC power, or even price.
It's our commitment to giving you a quality hi-fi receiver, no matter how much, or how little, you plan to spend.
So if you're planning to spend less than $400, you couldn't ask for more than the SX-780.
PIONEER, We bring it back alive.
POWER: 45 watts per channel min. at 8 ohms from 2020,000 hertz with no more than 0.05% total harmonic distortion.
FM SENSITIVITY: Stereo; 37.0 dBf
S/N RATIO: Stereo; 72 dBf
CAPTURE RATIO: 1.0 dBf
POWER METERS: 2 SPEAKERS: A, B, AB TONE C.ONTROI S Dual TAPE MONITORS: 2
1978 U.S. Pioneer Electronics Corp., 85 Oxford Drive, Moonachie, N.J 07074,
YOU CAN LEAVE OUT DUAL WATTAGE METERS LIKE MARANTZ DID.
YOU CAN INSTALL AN INEXPENSIVE PRESS BOARD BOTTOM LIKE TECHNICS DID, INSTEAD OF A METAL ONE.
YOU CAN USE A CONVENTIONAL POWER AMPLIFIER LIKE , KEN WOOD INSTEAD OF AN ADVANCED DC AMPLIFIER.
YOU CAN USE STANDARD HIGH BAND FILTERS LIKE YAMAHA DID.
INSTEAD OF SPECIAL NTEGRATED CIRCUITS TO CANCEL THE UNWANTED FM PILOT SIGNAL.
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No matter what system you own there's an Empire Phono Cartridge designed to attain optimum performance.
Detail, brilliance, depth.
This is the promise of each Empire Phono Cartridge and although there are many Empire models, each designed to meet specific turntable performance characteristics, every Empire cartridge contains the following features:
Features
Details
Benefits
Unique Fixed Unidirectional Three Magnet Structure Every Empire cartridge uses 3 high energy ferrite magnets in the cartridge body to provide a high level of unidirectional flux.
Higher and more linear output signal, immunity to bi-directional magnetic distortion, and improved hum and microphonic rejection.
Molded Four-Pole Magnetic Assembly Every Empire cartridge employs a four-pole magnetic assembly that is precisely aligned and locked in place by a high pressure injection molding pro cess... providing a uniform and orthogonal magnetic field.
Improved crosstalk and reduced distortion that is insensitive to tracking force.
Tubular moving Iron Design By using a tubular high magnetic saturation iron armature we obtain an optimum ratio of output level to effective tip mass.
Improved tracking ability and widened frequency response.
Four Coil Hum Bucking Assembly Plus Electromagnetic Shielding
Using custom designed computer controlled machines, a precision drawn copper wire (thinner than human hair and longer than a football field) is wound onto a symmetrical 4 bobbin structure. By using 2 coils per channel a symmetrical electrical circuit is formed.
Improved rejection of hum and stray noise fields.
Aluminum Alloy Cantilever The Empire computer designed tubular cantilever provides optimum coupling of the diamond tip to the moving magnetic system resulting in minimum effective stylus tip mass.
Superb low level tracking, reduced tracking distortion... plus enhanced wideband separation characteristics.
Precision Ground Oriented Diamond Tips Empire diamonds are precision ground, polished and inspected in house, using sophisticated tele vision cameras and powerful microscopes to ensure accurate angular orientation.
Reduced tracing phase distortion, together with reduced wear of both the record and the diamond tip.
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For the full story on Empire cartridges we suggest you "test-listen" to one at your local Empire dealer, and for information on our full line of cartridges, write for our brochure "How to Get the Most Out of Your Records": Empire Scientific Corp., Garden City, N.Y. 11530
EMPIRE
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QUALITY In REVERSE
AKAI introduces automatic reverse record at popular prices.
Now instead of interrupting great moments in music when its time to flip the cassette, AKAI's two newest decks automatically reverse the tape and continue to record or play back.
In addition, the deluxe GXC-735D is loaded with all the features that make the difference between a good deck and a great one. Things like AKAIs exclusive GX (glass and crystal ferrite) heads, guaranteed for 150,000 hours--the equivalent of playing 24 hours a day for 17 1/2 years. As well as feather-touch controls, Dolby, memory rewind, quick reverse and dramatically recessed red/green illuminated VU meters.
Not to mention the kind of specs serous component buyers all over the world depend on AKAI to deliver.
(For the more economy-minded, there's the CS-732D.
Same great auto reverse record/playback feature, with Dolby, quick reverse and tape selector- a lot of AKAI quality for not a lot of money.)
Hear them both at your AKAI dealer or write AKAI America, Ltd., 2139 E. Del Amo Blvd., P O. Box 6010, Compton, CA 90224. And see how they can reverse your thinking about automatic recording.
GXC-735D: Wow/Flutter--less than 0.08% WRMS; S/N Ratio--better than 58 dB, weighted, at FeCr position, with peak level at 3% THD. Dolby on improves up to 10 dB above 5 kHz. Frequency response-– 35-17,000 Hz (± 3 dB) using FeCr tape.
CS-732D: Wow/Flutter--less than 0.08% WRMS; S/N Ratio-better than 57 dB, weighted, at FeCr position, with peak level at 3% THD. Dolby on improves up to 10 dB above 5 kHz. Frequency response- 38.16,000 Hz (± 3 dB) using FeCr tape.
AKAI You never heard it so good.
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High-tensile strength leader staking prevents leader/hub detachment.
Head-cleaning leader tape-keeps recorder heads clean.
Felt pad and beryllium/copper spring assembly for precise tape to head contact.
When we invented Grand Master studio recording tape in 1973, professional recording engineers grabbed it. And Grand Master soon became the unquestioned leader in its field.
But in 1973, not even the most sophisticated home users had the kind of equipment that could drive tape hard enough to explore Grand Master's amazing potential. For output sensitivity. Ultra-wide dynamic range. Improved signal-to-noise.
And low distortion.
In the studio, yes. But not at home.
Now, the world has changed.
Home equipment has improved dramatically. With bias flexibility. Higher output.
And lower distortion.
So that now, the time is right for Grand Master.
In cassette, 8-track, and open reel. Including a specially formulated Grand Master II cassette, for high bias.
You're ready for it. And it's ready for you.
GRAND MASTER BY AMPEX.
WE THINK YOU'RE READY FOR IT.
Ampex Corporation, Magnetic Tape Division, 401 Broadway, Redwood City, California 94063 (415)367-3881
Graphite-impregnated Teflon friction plates for smooth tape wind.
True-Track"' fore-and-aft Guide system for precise azimuth control.
Precision guide rollers with stainless steel pins provide smoother tape movement with minimal friction.
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JBL
The first time you hear the L22.0's.
before you know what's happening to you, you smile.
Later, when you find the words. you'll be able to talk about things like-texture
and "detail" and-subtlety- But right now ifs all feeling. It's love at first sound.
Crank them up. Try 110db. Go ahead.
That's what they're there for. Drench yourself in pure sound. Crisp. right.
spacious, clean--certainly. But some thing well beyond. Something powerful, uncompromising, awesome.
Now turn them down for a minute and listen with your eyes. The L220's are tall, tapered, elegant--appearing more slim than they actually are.
Now slip the grille off and feast your eyes on the components: New high frequency elliptical ring radiator. New refracting wave guide for the midrange.
A 14" woofer with a massive. twelve pound magnetic assembly A 15" passive radiator. Four superb individual per formers. How do they work together?
Magnificently.
Because there’s no such thing as too much music.
vertical alignment. They are in precise acoustical alignment, too. The time domain response, the phase linearity is flawless. JBL's engineers accomplished this without creating one of those staggered baffle fronts that cause as many problems as they solve.
Come celebrate the L220's.Theyre yours for $1,750 a pair. They're a whole lot of loudspeakers from JBL-- the people who gave high performance sound a first name.
JBL.--GET IT ALL.
Last year, 35 of the top 50 albums were recorded or mixed in studios using JBL loudspeakers. Shown here: Criteria Studios, Miami, Florida.
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Dual
If you'd like to hear an hour or more of uninterrupted music, don't let a few old myths stop you.
Dual's exclusive elevator-action. A) Records are supported entirely by platform. B) Bottom record is lowered away from stack above which is held in place by soft neoprene pads. C) Platform retracts, gently releasing record to platter. D) Platform rises to engage stack.
No need to worry about record grooves touching when stacked. Records are made with raised edges and centers which place an air cushion between the playing surfaces.
Myths die hard. Those about all multiple-play turntables compromising performance are no exception, despite the achievement of the legendary Dual 1009.
Before then, serious music lovers were understandably reluctant to entrust their records to the heavy-tracking, vinyl-chewing automatic tonearms of the day.
We therefore felt the need to prepare for the 1009's introduction by asking cartridge manufacturers and independent test labs to put it through the most demanding tests they could devise.
The manufacturers reported that the 1009 tracked flawlessly with their "processional-type" cartridges. The test labs found the 1009 matched the best of the manuals in rumble, wow and flutter-and they quickly adopted it as one of their reference-standard turntables.
Since then, of course, Dual has added refinement after refinement. The tonearms of all current Dual turntables are mounted in four-point gyroscopic gimbals, widely acknowledged as the finest suspension system available.
During play, Dual automatic tonearms are completely free-floating. They are engaged by the cycling mechanism only when being moved to or from the record.
Records stacked on Dual's multiple-play spindle are handled with extraordinary care. Before the bottom record is released to the platter, it is gently lowered away from those above. Nothing is ever forced. This is Dual's famous "elevator-action" system. And since all records are made with raised edges and centers, an air cushion keeps the grooved surfaces from ever touching.
In the single-play mode, the short spindle rotates with the platter. This patented design permits more precise centering of the record, an important touch in achieving extremely low wow and flutter specifications. Another touch of Dual precision is the vertical tracking angle control;
there's an optimum setting for single play and multiple play.
But one very important thing hasn't changed. Dual reliability. Backed by a two-year limited warranty, today's Duals are made to last just as long as the 1009 and its successors (the 1019 and 1219) which are often found to be worth more in trade than their original purchase price.
So if you'd like, many years of uninterrupted pleasure from your next turntable, select one of our multiple-play models. (They start at less than $180 for the CS1237.) Unless, of course, you prefer old myths to future legends.
For the life of your records United Audio,.120 So. Columbus Ave., Mt. Vernon. NY 10553 Dual
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Ohm's Law 4: It is possible to make a loudspeaker that doesn't sound like a loudspeaker.
According to the traditional laws of loudspeaker design, a small driver can't reproduce bass notes, and a large driver can't reproduce high notes.
So most loudspeakers use two or more piston-like drivers of varying sizes (woofers, midranges, and tweeters), to achieve wide frequency response.
Unfortunately, large drivers respond more slowly to the audio signal than small drivers. So "time delay" distortion is added to the music.
And time delay distortion is what makes a loud speaker sound like a loud speaker.
But Ohm F loudspeakers boldly defy the traditional laws of loudspeaker design.
They employ a single patented Walsh Transmission Line Driver that not only re produces all audible frequencies, from the lowest lows to the highest highs, but it does it without adding time delay distortion to the music.
That's why, when you listen to music with Ohm F loudspeakers, you hear the music, not the loudspeakers.
------Since all frequencies radiate in a 360 degree pattern from a single driver in the Ohm F, there is perfect horizontal dispersion with no time delay distortion.----
When audio critics listened to music with Ohm F loudspeakers, here's what they wrote about the experience:
Hifi Stereophonie (Germany):
"The most important aspect of the Ohm F's performance is its freedom from phase and time errors, i.e., its coherent sound. The Ohm F's are in a class by themselves."
Stereo Review:
"With one of the larger power amplifiers...the sound began to warrant the use of such words as awesome.
The low bass, too, was extraordinarily clean and powerful...it should be apparent from the foregoing that we include the Ohm F among those few speakers we have tested that achieves state-of-the-art performance." (Copyright 1973 by the Ziff-Davis Publishing Company. Reprinted from Stereo Review, October, 1973, by permission. All rights reserved.)
Stereo Buyer's Guide:
Judging loudspeakers no matter on what principle it has been designed, should always be on its sound quality, and we are happy to report that the Ohm F system is amongst the very best we have heard."
Complete Buyer's Guide to Stereo/Hifi:
"The Ohm F is an extraordinary loudspeaker.
The 'coherent' sound produced by this speaker is clear, full, and undistorted.
It may well be the finest speaker on the market, and is certainly without a doubt among the top few. Given the proper associated electronics, the Ohm F is capable of providing almost absolute realism in the listening room."
The FM Guide (Canada):
"They have one great quality, a quality that puts them right in the front line of "The most important desirable speakers. They sound musical. A pair of Ohm F's can recreate a live musical performance free of the usual spatial limitations imposed by conventional speakers."
For 13 complete reviews, and full specifications, please write us at:
Ohm Acoustics Corp., 241 Taaffe Place, Brooklyn, N.Y. 11205.
We make loudspeakers , correctly.
+++++++++++++++++
The single biggest mistake you can make.
From the outside, all speakers look pretty much the same.
But buying an off-brand, bargain speaker can be a very big mistake.
Since speakers are the only components that actually produce sound, when you compromise your speakers you compromise your entire music system.
Fortunately, there's one way to make sure you wind up with a speaker that sounds as good as it looks: Buy a speaker with a lame as good as the rest of your components.
At Kenwood. we didn't just start with a bunch of commercially available speaker parts. We started with a goal: To deliver a crisp, clean sound-hat accurately reproduces the original music.
First, we create each raw frame speaker.
For the tweeter and the midrange, We used a computer to design light-weight, extra-rigid cones.
We mount our speakers on a lumber-core baffle board made of special anti-resonant material. And design the enclosure to assure an acoustic match between cabinet and components.
Though you can't see all that by just looking at a Kenwood speaker, you'll know it tie first time you listen.
Next time you're at your Kenwood dealer, compare our $235.00, 3-way LS-407B with any off-brand speaker. Or, for that matter, with any speaker at all.
You'll save yourself from making a Dig mistake.
Your speakers' reputation should be as good as your receiver's.
KENWOOD---For the dealer nearest you, see your Yellow Pages, or write Kenwood, P.O. Box 6213, Carson, CA 90749.
'Nationally advertised value. Actual prices are established by Kenwood dealers.
Walnut grain vinyl finished cabinet
+++++++++++++
MCS
The incredible MCS Series 75 watt receiver.
MCS Series Sold and serviced only at JCPenney
Specifications:
SPECIFICATIONS
NOMINAL LIMIT AMPLIFIER SECTION:
Power output 75 Watt THD at rated power `)/0 0.25% Power bandwidth at 8 OHMS 20-20,000 Hz Frequency response 30 to 20,000 30 to 20,000 RIAA deviation phono ±0.5 dB ±1 dB Signal to noise ratio at 2.5 MV (dB) 75 70 Phono overload 200 MV 180 MV
FM TUNER SECTION:
Usable sensitivity Mono UV at 300 OHMS 1.8 2.5 Usable sensitivity Stereo UV at 300 OHMS 3 5 50 db quieting sensitivity Mono UV at 300 OHMS 3 5 THD Mono & THD Stereo 0.2% & 0.35% 0.3% & 0.5% Frequency response Hz 25 to 15,000 35 to 12,000 Capture ratio (dB) 1.5 2 Alternate channel selectivity (dB) 60 50 Image rejection (dB) 50 45 Stereo separation at one kHz (dB) 45 35 Features:
Graphic Equalizer with LED Readout Relay Protection 32 Detent Volume Attenuator Wattage Meters Two-Step High and Low Filters Deviation Meter Price $599.95 Multipath Meter LED Signal Strength Indicator AF Mute A JCPenney Warranty unsurpassed by any Hi-Fi manufacturer
*Within 5 years of purchase of speakers or 3 years of purchase of single or multiple play turntable, receiver, tuner, amplifier or tape deck of this Modular Component System, we will, at our option, repair or replace these items if defective in material or workmanship. Just return it to the nearest JCPenney facility.
++++++++++++++
Epicure
The lost word in the ongoing dialogue between musical art and the state of the art. A loudspeaker creation from Epicure representing over 2 1/2 years of development that will significantly influence the design of loudspeakers for years to come.
EPICURE
++++++++++++++
Again we turn the world around.
The world's first pure power DC receivers, the Sansui G-line, redefined the limits of musical fidelity Sansui's capacitor-free DC amplifier design (patent pending) with super-high slew rate, ultra-fast rise time, and full transient response, makes music sound much more true-to-life.
Now Sansui does it again. With the new G-7500 and G-5500. Using the same exclusive DC circuitry all others are trying to imitate, these new models offer more wafts per dollar than ever before.
The G-7500 delivers 90 watts per channel, min. RMS, both channels into 8 ohms from 20 to 20,000Hz with no more than 0.025% total harmonic distortion, at a suggested retail price of only $620.
The G-5500, at a suggested retail price of only $465, offers 60 watts per channel with no more than 0.03% THD under the same conditions.
From their macro-designed power supplies, for rich, full sound over the widest frequency range, to their micro-sensitive double speaker-protection circuitry, the G-7500 and G-5500 are unbeatable.
The FM sections further enhance Sansui's reputation for tuner excellence. Pinpoint selectivity and ultra-sensitivity to even the weakest signals guarantee pure and clean reception, always. And always with maximum stereo separation.
Let your franchised Sansui dealer demonstrate the comprehensive, human engineered features and controls. There's nothing in the world with quite the same feel as the Sansui click-stop attenuator and ultra-smooth tuning knob.
+++++++++++
We build a speaker that sounds like music It can accurately repro duce the 120+ dB peaks that are found in some live music. That's more than just being able to play music loud. It can accurately reproduce the music bandwidth--from below 25Hz to 20kHz.
And the Interface:D's vented midrange speaker reproduces midrange sounds with the clarity and purity that allows precise localization of sound sources- both lateral and front-to-back.
The Interface:D is the only commercially avail able speaker we know of that can meet these criteria. Audition them at your Interface dealer.
Electro-Voice. 600 Cecil Street Buchanan, Michigan 49107
++++++++++++
DISCWASHER presents The Clean Truth About Your Naked Stylus When your stylus plays over one light fingerprint or one tiny "bead" of vinyl stabilizer, the clean naked diamond becomes a glazed, dust-holding abrasive weapon wearing away at your records and masking their true sound.
This unseen build-up may actually hold the tracking tip of the diamond out of the record groove.
Accumulated grit on stylus that looks "clean" to the naked eye.
The SC-1 Stylus Cleaner from Discwasher is designed with a brush that is stiff enough to remove harmful accumulation, but gentle enough to avoid damaging delicate cartridge assemblies. Two drops of Discwasher's D3 Fluid add extra cleaning action to the SC-1 without the side-effects of alcohol, which can harden rubber cantilever mountings.
After cleaning with SC-1 and D3 Fluid by Discwasher.
The retractable, walnut-handled SC-1 includes a magnifying mirror for convenient inspection of stylus/cartridge alignment and wiring.
Get the clean truth from your records; get the SC-1.
SC-1 STYLUS CLEANER discwasher inc.
1407 N. Providence Rd.
Columbia, MO 65201
+++++++++++++++
Introducing Sharp's solenoid deck that plays selections according to your musical appetite.
If you hunger for one of the world's most advanced tape decks, then Sharp's RT-2251 is for you.
The RT-2251 teams the genius of the Sharp Eye' with the convenience of solenoid controls. A combination you won't find on any other deck.
The Sharp Eye gives you individual song selection. It plays only what you want to hear. And skips what you don't.
And the solenoid controls give you feather touch finger-tip control. For faster response and greater accuracy of all tape functions.
If once isn't enough when one of your favorites finishes, tell the Sharp Eye to play it again. And it will. Automatically.
You even have the option to change your mind. The Sharp Eye lets you interrupt one song and go on to the next. Instantly.
How do we do it? Simple. The Sharp Eye scans the tape at high speed, finds the blank spaces be tween selections and automatically plays back the music of your choice. To skip a selection it operates in fast forward. And for repeats, it works in reverse.
You'll also like the gourmet specs Sharp's cooked up for you. The RT-2251 serves up 0.055% wow and flutter, a S/N ratio of 66dB (Dolby* on, over 5kHz) and a frequency response of 30-17 000Hz (FeCr).
To get a real taste of our RT-2251, see the Sharp audio dealer nearest: you or write Sharp Electronics Corporation, Dept. SR, 10 Keystone Place, Paramus, N.J. 07652.
SHARP
Dolby is a trademark of Dolby Laboratories.
++++++++++++++++
TDK's new one-second, no-headache demagnetizer.
You don't need time or technical expertise to operate TDK's exclusive instant head demagnetizer. Just pop it into your deck and push "Play" to re store musical performance lost through inevitable head magnetization. Other demagnetizers can be less effective, take more time, or actually magnetize your heads and are more difficult to use. Because our HD-01's miniature battery powers sophisticated circuitry built into a standard cassette shell, it solves all of these problems. You will hear the performance improvement in your home, portable or auto system.
TDK Electronics Corp., Garden City, NY 11530.
The Machine for your Machine.
++++++++++++++++
Only the most sophisticated research and development in this industry could create Two sources of perfection in stereo sound! Pickering's patented Dustamatic Brush keeps records free of dust and damps low frequency tonearm resonance.
PICKERING XV-15/625E.
It takes real effort and skill to become the acknowledged leader in the industry, and even more to stay ahead.
Pictured above are just a few of the advanced electronic devices that Pickering employs in product research and custom-designed development. At left above, the XYY plotter on Pickering's Real Time Analyzer and, at the right above, Pickering's remarkable Scanning Electronic Beam Microscope capable of 160,000 time magnification.
Pickering's engineering department is responsible for creating these two outstanding cartridges that, as one reviewer stated: "The XV-15 /625E offers performance per dollar; the XSV /3000 higher absolute performance level." Both the XSV /3000 with its trademarked Stereohedron Stylus tip for the least record wear and the longest stylus life achievable so far... and the XV-15 /625E... represent best buys at their price levels. Audition them today at your Pickering Dealer.
For further information write to Pickering & Co., Inc., Dept. SR, "for those who can hear the difference" 101 Sunnyside Blvd., Plainview, N.Y. 11803
++++++++++++
There is a new reference standard in phono cartridges. The name is Nagatron. And the difference is clear.
Samarium-cobalt magnets, crystalline aligned diamonds and an array of cantilever constructions are but a few of the latest advances employed it Nagatron cartridges to deliver clean transients and tonal clarity available from your record grooves.
On the record, it's the best you can do for your records.
NAGATRONICS-CORP. 2280 Grand Ave. Baldwin, Ny . USA.
+++++++++++++++++
ALLISON: THREE corner speaker system
The Allison : THREE speaker sys tem, when used in a room corner, has the same performance as that of an ALLISON:ONE system placed near a single wall. Its price is $130 less.
As is true of the larger model, the Allison: THREE system is capable of flat power output over its entire operating range in the only environment that counts: a room for listening to music. Loudspeakers of conventional design may have nearly flat power output in anechoic test chambers, but will have very uneven out put in the middle bass range (typically 6 to 12dB) when placed in .a listening room.
Extremely wide dispersion of middle and high frequencies permits spacing a stereo pair of ALLISON:THREE systems considerably farther apart than is possible with conventional loudspeakers.
Descriptive literature on the ALLISON: THREE and other ALLISON systems, which contains technical specifications and a statement of Full Warranty, is available on request.
Stabilized Radiation Loading.
U.S. Patent No. 3,983,333 ALLISON ACOUSTICS INC.
7 Tech Circle, Natick, Massachusetts 01760
+++++++++++++++++
discover . . .
The inside story of a classic.
Introducing a new type of record cleaner. Meet the CLASSIC 1, the only cleaner of its kind. Developed to satisfy you, the discriminating audiophile.
Neutralizing the static charges that attract and hold destructive micro-particles of dust and dirt on your record's surface is one of the major problems in record care.
Ordinary cleaners attempt to reduce static charges by applying fluid directly to the surface of the record or cleaning unit. Direct application of fluid involves an inherent risk of harmful residue build-up and should be avoided except in the case of abnormally dirty or greasy records. In fact, normal maintenance should not involve wetting the record.
At last, the CLASSIC 1 has the answer to safe and effective cleaning. Not only are static charges reduced, but the problem of residue formation is eliminated. Cleaning is safe and effective because inside the CLASSIC 1 is the exclusive MICRO STOR SYSTEM which utilizes a humidification/cleaning process rather than a 'wet' technique.
The secret to the MICRO STOR SYSTEM is a permeable matrix of many thousands of tiny glass beads which retain the cleaning fluid.
Through capillary action, a vapor penetrates the velvet surface creating a field of humidity sufficient to reduce static charges. Disc contaminants can now be removed safely and easily without wetting the record and risking residue build-up.
Discover the ultimate in record care.
The CLASSIC 1, a Sound Saver product.
Available at finer audio dealers .
+++++++++++++++
MUTT & JEFF. TWO OFTHE MOST AMAZING AR SPEAKERS EVER.
Here you have two of the newest additions to the AR range.
The little fellow (AR18) sells for about $70.
The big guy (AR9) is approximately $750.
Each, in its own way, is formidable.
If you're ready to spend over $1000 for a pair of speakers you'll be “demo-ing” some pretty exotic hardware. Even so, the AR9 is practically guaranteed to boggle your mind. Stuff that costs a lot more won't sound as clean and strong, and give you such an impeccable stereo image.
And the AR18 will prove equally startling.
Especially if you compare it with speakers around twice its size and price. People who've made this little comparison blindfolded are amazed. How can a little character like the AR18 sound so big, bold, and accurate? That's the AR secret. One standard for all speakers.
Truth in listening.
So, while the big guy will handle up to 400 watts per channel, vs 100 watts for the small one (both driven to clipping 10% of the time and using normal source material)... and while there's a difference in the sound levels and the bass, both have the same flat response and satisfying sound.
It means that no matter how big your room or your bank account, you don't have to settle for less than the highest quality speaker delivering high quality sound.
With AR you pay your money. But you don't take any chances.
++++++++++++++++++
If your choice is sonic excellence over watts per dollar, you'll prefer one of these LUX tuner/amplifiers.
LUX amplifiers and tuners, whether single-chassis or separates, were never intended to compete with typical receivers-those that equate output power with performance. We have a different attitude.
Our audiophile/engineers design for those subtle amplifier and tuner qualities that contribute significantly to sonic performance under actual musical conditions. We're interested in more than the way our equipment measures during sine-wave lab testing. We're vitally concerned with the way it per forms in the real world with musical material.
So it's no wonder the acclaim that initially greeted our separate amplifiers and tuners has been matched by our combined tuner/amplifiers.
For example, Stereo Review said this about the Luxman R-1050: "The excellent audio-distortion ratings...obviously place it among the cleanest of the currently available receivers... operation and handling (is) as smooth and bug-free as its fine appearance would suggest." High Fidelity described our R-1120 this way: "As beautiful to behold as to hear... an effortless quality to the sound that just radiates class...the FM tuner is impressive, to say the least." And Audio summed it up with this: "Lux seems to have the ability to pro duce product after product that just sounds better." Our tuner/amplifiers come in a wide range of power to suit every need (and weaker efficiency) from a top of 120 watts per channel for the R-1120 to 30 watts for the new, modestly priced R-1030.
Whichever of our four models you choose, you'll get only one standard of sonic excellence.
LUX. 160 Dupont Street, Plainview, New York 11803.
Luxman R-1120.120 watts per channel, total harmonic distortion no more than 0.03%!Switchable turnover points. 12-LED peak level display with selectable sensitivity. Closed-lock-loop FM tuning circuit. Direct-coupled preamplifier equalizer stage and direct-coupled DC power amplifier. Outputs and switching fcr electrostatic speakers.
Luxman R-1050. 55 watts per channel, total harmonic distortion no more than 0.05%. 12-LED peak level display with selectable sensitivity.
Dual-gate MOSFET front end. Direct-coupled preamplifier equalizer stage and direct-coupled DC power amplifier. Connections for two decks, two phonos, auxiliary: tape-to-tape dubbing.
Luxman R-1040. 40 watts per channel, total harmonic distortion no more than 0.05%.* 12-LED peak level display with selectable sensitivity.
Special negative feedback-type bass and treble controls. Tuner section with linear-phase filters and phase-locked-loop multiplex IC. Direct-coupled preamplifier equalizer stage and direct-coupled DC power amplifier.
And the new Luxman R-1030. 30 watts per channel. Our lowest-priced tuner amplifier, yet total harmonic distortion is no more than 0.05%. Among its features: our special negative-feedback tone controls.
Minimum continuous power, both channels driven into 8 ohms, 20-20 kHz.
++++++++++++++
That clean, open look of these new Crown components is intentional. The Power Line One amp and the Straight Line One pre-amp are designed for people who delight in accurate sound reproduction, whose joy is in listening, and for whom simplicity of operation is important.
They are obviously easy to operate, yet all the basic controls you need for accurate reproduction and monitoring of fine quality sound are there.
But your greatest enjoyment will surely come from the unusual sonic accuracy of these units. They are acoustically as transparent as can be imagined.
Achieving that purity of sound and function wasn't simple. We've had 27 years experience in building state-of-the-art audio components, such as the world-famous DC-300A high-power amp and the newer DL-2 digital logic pre-amplifier. We've learned a great deal about what can and cannot be done with circuit design, with transistors and with IC's.
clean sound.
That experience is reflected in new computer-aided circuit designs. In the Straight Line One phono pre-amp section, for instance, internal noise is so low that thermal noise from your cartridge will be the dominant source of noise.
This circuit technology has also made possible other features you're bound to enjoy. The phono pre-amp is a separate module, much like the system developed by Crown in the DL-2. It eliminates troublesome RFI. Note also that Crown put distortion indicators on both units. The amplifier has both the unique Crown IOC circuit plus new peak output voltage LED's. Front-panel speaker switching and a new concept in DC speaker protection provide flexibility of layout and security of operation at high levels.
Please don't take our word for all of this. Visit your Crown dealer soon. Listen to the clean, full range sound of the Straight Line One and the Power Line One. That experience should simplify your buying decision.
crown--------1718 W. Mishawaka Road, Elkhart, Indiana 46514 American innovation and technology... since 1951.
++++++++++++++++
The A-800: A TEAC with features you can't live without at a price you can live with.
The TEAC A-800 gives you one of the best, most affordable combinations of precision, muscle and good looks around. It's a three head, two motor, dual capstan, solenoid-operated cassette deck that lists for less than $800.* The A-800 transport has a computer heritage … heavy, rock-steady, reliable. The closed-loop dual capstan system isolates the tape between the capstans to provide optimum tape-to-head contact. Result: better frequency response, fewer dropouts. An ultra-stable motor drives the capstans while all transport functions are operated through feather-touch solenoid switching both on the deck and with the optional RC-90 Remote Control.
The A-800 uses a combined record/playback head in which both elements are incorporated into a single housing. What's more, the playback head is a unique "Delta" design which incorporates both magnetic and non-magnetic ferrite materials which assures mini mum feedthrough from the record head and eliminates low frequency contour effects.
In addition to its built-in Dolby, the A-800 also accepts an optional dbx° Type II for wider dynamic range and zip to 80 dB S/N. This optional dbx interface-a TEAC ex 2.1usive-lets you improve the overall signal-to-noise performance by up to 30 dB. It's got to be heard to be believed! First. Because they last.
TEAC Corporation of America 7733 Telegraph Road Montebello, California 90640, dbx is a trademark of dbx, Inc.
+++++++++++++++
No speaker close to its size and price can deliver anything so close to the sound of the live performance.
The Infinity Qe. $109. If you thought the Infinity Qe was an incredible speaker-and an incredible buy at $155-- wait till you hear our new Qe.
The least expensive Infinity speaker, it has the clarity and sweet ness in the upper registers; the definition and delicacy in the mid range; and the tight, clean bass that is characteristic of all Infinity speakers.
This is a true audiophile component. No speaker at its price has ever come close to its accuracy, openness and transparency.
The reason is simple: Qe is the beneficiary of Infinity state-of-the-art technology. It has our EMIT Electromagnetic Induction Tweeter (same as all our much more expensive Quantum and Q Series speakers). It has an 8-inch version of the remarkable Q-woofer (with its phosphor bronze voice coil former, butyl surround and special cone treatment) found in, our highly acclaimed Qa and Qb..
Equally important, Qe has had built into it a year of sonic measurements, creative listening and critical adjustments by our scientist/musician designers, in order to optimize its sound for bookshelf rather than open floor space, and to create an unparalleled bookshelf instrument.
Test Qe with your most demanding records in an Infinity dealer's listening room. It will be a revelation.
You'll hear orchestral colors, subtle nuance of inner voices and a sense of three-dimensional depth you've rarely heard from records.
Just 18 by 12 by 10 inches, the Qe speaks from 47 Hz through a spectacular 32,000 Hz ±3 dB and can live happily ever after with amplifiers or receivers of from 10 to 100 watts of RMS power per channel.
A formidable achievement. And, at $109 a remarkable price.
A free call to 800-423-5244 (in California: 800-382-3372) gets you Qe literature and the name of your nearest Infinity dealer. Run, don't walk.
About that "e" in Qe: This is the speaker for everyone.
Infinity Qe We get you back to what it's all about. Music.
Infinity Systems, Inc., 7930 Deering Ave.. Canoga Park, CA 91304.
+++++++++++++++++
"The Highly Prized Receiver...
ONKYO's TX- 4500 MkII
In the beginning there was only one Quartz-Locked tuning system. Onkyo's TX-4500. While others started building their own versions, Onkyo's innovative genius was improving on the first to produce the finest.
The result. TX-4500MKII, the world's first IC Quartz-Locked tuning system for totally drift-free reception... and in heavy demand nationally. An improvement on the model Hirsch Houck Labs called, "one of the finest receivers available at any price," * with more power (60 watts per channel minimum RMS, both channels driven at 8 ohms with no more than 0.1% THD from 20Hz to 20,000 Hz), new and convenient styling, wide-ranging flexibility and integrated circuitry for longer life and cooler running.
Check the features.
The all stage DC OCL Power Amp for delivering clean power. Heavy duty 12,000pF electrolytic capacitors to reduce transient crosstalk distortion. And 200mV RMS phono overload level ensured by linear 3-stage DC equalizer amp. For minimum overload distortion the dual gate MOS FET front end; for superb FM stereo separation the PLL MPX circuit and for maximum selectivity the FM 4-ganged, AM 2-ganged variable tuning capacitors.
All contributing to a quality product.
Redesign has resulted in sloping panels for easy observation, group controls for easy operation, and facilities for 2 turntables, 3 tape decks with dubbing and 3 speaker systems. Complete mode, function and tone controls including high and low filters with 12dB oct slope and Dolby 25 us deemphasis switching.
With so much, invested, the TX-4500MKII is equipped with an electronic detector circuit sensitive to the slightest malfunction and a shut-off relay to cut off speaker power in case of a short circuit or drop in load impedance.
Nothing has been spared to give you the most for your money. There's nothing finer on the market.
See everything that Onkyo has to offer at your local dealer or write for information and the name of your Onkyo dealer. Find out how Onkyo stays... a step ahead of state-of-the-art.
STEREO REVIEW, October 1976.
Dolby is a trademark of Dolby Laboratories Inc.
Artistry in Sound -- Eastern Office: 42-07 20th Avenue, Long Island City, NY 11105 (212) 728-4639 Midwest Office: 935 Sivert Drive. Wood Dale, IL 60191 (312) 595-2970 West Coast Distribution Center: Damark Industries. Inc., 20600 Nordhoff Street, Chatsworth, CA 91311 (213) 998-6501
Canada: Sole Distributor, Tri-Tel Industries, Ltd., Ontario, Canada
+++++++++++++++
Before Sound Guard, you only played a record in mint condition once.
Magnification shows the record vinyl wearing away.
Same magnification shows no record wear.
You can see how the picture has changed.
Independent tests show that records treated regularly with Sound preservative maintains sound fidelity by reducing record wear. And with its built-in, permanent anti static property, it resists Guard preservative
Aim dust accumulation.
Sound Guard products:
keep the same full 6
And now, two new amplitude at all frequencies, the same absence of surface record cleaner,
noise and hat
nionic
developed from extensive distortion as records played just research into once in mint condition. record cleaning
With its patented dry-
problems and lubricant film, Sound Guard.
methods, removes all common record contaminants-from dust particles to oily fingerprints.
And whether your re cords need a light cleaning to remove surface dust or a thorough cleaning to remove deep-seated contaminants, Sound Guard record cleaner does both.
2. Sound Guard
Total Record Care System puts Sound Guard record preservative and Sound Guard record cleaner in one package for the best possible total care for all of your records.
Available in audio and record outlets.
Tests available on request.
Sound Guard keeps your good sounds sounding good.
Sound Guard preservative-Sound Guard cleaner-Sound Guard Total Record Care System Sound Guard is Ball Corporation's registered trademark. Copyright Ball Corporation, 1977. Muncie, IN, 47302
+++++++++++++++
True Tangential Tracking Turntable -- by Revox
In the one hundred years since Edison recorded "Mary had a little lamb" on a tinfoil cylinder, no one found a way to eliminate the mass of bulky tone arms.
Then Willi Studer developed the revolutionary ReVox B790 true tangential tracking turntable. It replaces the conventional tone arm and all its problems with a unique, patented opto-electronic playback servo system.
The cartridge moves up, down and laterally guided by a beam of light. It's easy on your record grooves and easy on your nerves. It's so simple and goof-proof even a child can safely play your most treasured records.
The new ReVox B790 looks and performs better than any turntable you've ever seen or heard. To give it the ultimate test, bring your favorite record to your ReVox dealer for a demonstration. For complete information and the name of your nearest ReVox dealer, circle reader service number or write to us.
REVOX Studer Revox America, Inc., 1819 Broadway, Nashville, Tenn. 37203 / (615) 329-9576 In Canada: Studer Revox Canada, Ltd.
+++++++++++++++
THE TUNE UP KIT FOR YOUR CAR STEREO.
IT'LL GIVE YOU A BETTER HIGH END.
With a Scotch-Master III Cassette and a minor change in your recording routine, you can noticeably boost the highs you get from your car stereo.
You see, our Master III Cassette was engineered for use with the ferri-chrome switch position on your cassette recorder. Normally, you'd record and play back in this position, enjoying strong response across the entire frequency spectrum.
But most hi-fi buffs seem to agree it's the high frequency response in particular that adds the details to your sound and makes high fidelity truly high. And this high frequency response is especially critical in car cassette players.
You can boost those highs simply by recording on a Master III ferri-chrome cassette in the normal switch position. Master III records with more highs than standard tapes, so you'll be getting stronger highs on playback than were really there to begin with.
Give it a try. You might just get hooked on the highs you get with a Master III Cassette.
RECORDING -- THE TRUTH COMES OUT.
3M COMPANY
++++++++++++++++++++
Miniaturization breakthrough!
Realistic's fabulous new System Seven combines beauty, elegant small size and a level of acoustical quality you've never heard, until now, in low-priced book shelf stereo.
System Seven includes our new STA-7 AM/FM receiver (10 watts per channel, minimum RMS into 8 ohms, 20-20,000 Hz, with no more than 0.5% At last-true hi-fi perfectly sized for a bookcase. The 4-1/2-lb. speakers can even be used for bookends! Realistic's System Seven ...
a new size and shape for stereo total harmonic distortion) and a pair of our amazing Minimus 7 speaker systems-featuring large-excursion woofers and soft-dome tweeters in diecast enclosures only 7 1/16" high.
Bass without bulk. Despite its small size, System Seven delivers rich, satisfying bass to 50 Hz and sound levels up to 90 dB for ac curate reproduction of anything from classical to rock music.
What's the secret? The receiver has a unique equalization net work engineered especially for the speakers. And it's switchable so you can use full-size speakers, if you wish.
Compact, but no compromises.
You get "full-size" high-fidelity features with System Seven magnetic and aux inputs, tape monitor, A/B speaker switching, even 75 and 300-ohm FM in puts. U.L. listed, of course, and housed in a stunning jet-black metal cabinet with blackout dial.
Receiver is briefcase-sized, a little taller than a credit card-just 3-1/2" high.
Each speaker is about the size of two average books.
The price for all this may be the surprise of your audio life-only 219.95 , a savings of $39.90 off the "each" price! Audition System Seven. Small has never been so beautiful!
'Price may vary at individual stores and dealers.
A Division of Tandy Corporation Fort Worth, Texas 76102
The nationwide supermarket of sound.
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Who says you can't afford a moving coil cartridge?
Two things are quite clear: a moving coil cartridge reproduces music more accurately than any other cartridge design;
Ortofon, the developer of the design, makes the finest moving coil cartridges in the world.
But a moving coil cartridge represents the tip of an expensive music system. For one thing, the coils have to be painstakingly wound under a microscope. For another, its low output, which pays dividends in high performance, requires a transformer to boost the signal (unless your receiver already has provision for a moving coil cartridge).
So the moving coil cartridge is the best way to get the most out of your records. But expensive.
Best? Yes.
Expensive? No longer.
The MC10 Moving Coil Cartridge
Since 1948, when Ortofon in vented the moving coil cartridge, the company has been seeking ways to improve performance and make it available to more and more listeners. The new MC10 is a major step forward in both of these areas.
Construction
The new cantilever in the MC10 is constructed of a special alloy, chosen for rigidity and low mass.
With its tiny super-polished elliptical diamond, you get very low tip mass and its many benefits:
excellent tracking, easy handling of transients and minimal record wear. Gold plated terminal pins eliminate the possibility of corrosion. Solderless press-fit contacts secure internal wire contact to the pin shells. In short, everything has been done to make the MC10 a high performance cartridge.
What makes it affordable, is that new and artful methods of production have made the MC10 easier and faster to produce.
The Affordable Combination
The best moving coil cartridges require that the signal be boosted before entering your receiver. If your receiver has no provision for a moving coil cartridge, we suggest that you consider the STM72. It's a double-shielded transformer designed to function beautifully in tandem with the MC10.
The good news is that the price of either or both of these Ortofon products makes moving coil performance available to many more music lovers who've had to satisfy their desire for exquisite musical performance with a less accurate cartridge.
Write to us. We'll forward full information about the MC10 and STM72. Better yet. Visit your Ortofon dealer with your favorite record. You'll hear qualities in it that will make you value that re cording more than ever. You'll also learn that you can afford a moving coil cartridge.
THE MOVING COIL PRINCIPLE
All cutterheads use a moving coil system to inscribe music onto a master record. The moving coil playback cartridge "extracts" music in the same way. This is one reason that the moving coil design reproduces musical sound with unparalleled accuracy
ELECTRIC CURRENT-COILS
MAGNETIC FIELD
CUTTING STYLUS
CUTTERHEAD: an electrical current is run through a coil of wire which is within a magnetic field. This current (actually the material to be recorded), creates movement in the coils which, in turn, set the cutting stylus into the intricate motions that cut the remarkably complex record groove.
ELECTRIC CURRENT COILS
MAGNETIC FIELD PLAYBACK STYLUS
PLAYBACK CARTRIDGE: the stylus traces the undulations of the record groove, moving up and down and side to side. That motion is transmitted, to coils located within a magnetic field. This generates an electrical current (carrying the pro gram material) which is now ready to be amplified.
Ortofon , 122 Dupont Street, Plainview, New York 11803
Our pressure pad is locked into a special four-sided retainer to maintain perfect tape-to-head contact.
Our slip sheet is made of a substance that's so slippery, even glue can't stick to it.
Our leader not only keeps you from making recording errors, it also keeps your tape heads clean.
Our cassette is held together by steel screws to assure precise alignment and even distribution of pressure on all sides of the cassette.
Our Delrin guide rollers make sure our tape stays perfectly aligned with your tape heads.
Our standard cassette shell is finished to higher tolerances than industry standards.
Our recording tape is considered by most audiophiles to be the world's fines- tape.
Our tape window is welded in to keep dust out.
Our tape is anchored to our hub by a special clamping pin that makes slippage impossible.
There's more to the world's best tape than the world's best tape.
Our reputation for making the and more work into our cassettes world's best tape is due in part to than most manufacturers put into making the world's best cassettes. their tape.
In fact, we put more thought We do all this, because at Maxell we believe in a simple philosophy.
To get great sound out of a cassette takes a lot more than lust puffing great tape into it.
Maxell corp America, 60 Oxford Drive, Moonachie, N.J 07074
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When what's built-in is not enough.
Still hearing some "SSSSSSSS," even though you're using good tape and the noise reduction system in your deck? Don't blame the tape. Chances are, that noise reduction system doesn't have what it takes to give you totally noise-free recordings.
The answer: a dbx II tape noise reduction unit.
All of our models give you 30 dB of noise reduction at all frequencies, plus 10 dB extra recording level headroom. Without altering the sound of your music, either. The best that Dolby* B can offer is 7-10 dB of noise reduction. Besides, Dolby and other typical systems operate only at high frequencies, allowing low frequency noises to remain. And as experts know, they require level matching. dbx II doesn't require any level matching whatsoever, because its true mirror image compression/expansion operates linearly on all frequencies and your music's entire dynamic range.
*Dolby is a registered trademark of Dolby Laboratories, Inc.
UNLOCK YOUR EARS
This au means that the live performances, FM broadcasts and record albums you tape will have their full dynamic range preserved, with no audible tape noise added. So, if you're unhappy with the noise reduction system in your tape deck, consider a dbx II.
We make 3 models: the 122, for two-channel tape noise reduction; the 124 for four-channel tape noise reduction, or simultaneous off-tape monitoring of the noise-reduced signal; and the 128 combination tape noise reduction system/dynamic range expander, which lets you make tape copies of your recordings that sound better than the original.
The dbx difference is the difference between some tape noise and no audible tape noise at all. Hear it at your dbx dealer soon.
dbx, Incorporated 71 Chapel Street Newton, MA 021.95 617/964-3210
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DENON Masters of PCM The first digitally master-recorded disc was released by Denon in 1972. A revolution was thus begun in stereo phonograph discs that have better dynamics without tape hiss that magnetic mastering can produce.
Discwasher now offers the Denon catalog of 90 classical and jazz releases featuring such artists as Jean-Pierre Rampal, the Czech Philharmonic, the Suk Trio, Sonny Stitt, Billy Harper and Archie Shepp, with selections from Telemann to Beethoven.
Knowledge and experience with PCM recording technique make Denon the clear-cut master of the digital revolution. And your audio system will prove it!
DENON DIGITAL RECORDINGS--from Discwasher, Inc.
discwasher; inc.
1407 N. Providence Rd.
Columbia, Missouri 65201
J. S. BACH ORGAN CONCERT
DENON
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1 , fact:
calling this a "brush" is like calling this a "radio" we call it a Dynamic Stabilizer
...critics call it a major innovation True, the device on the front of a V15 Type IV cartridge bears a superficial resemblance to a cleaning brush.
In reality, it is a complex, exquisitely engineered subassembly which performs several complex functions that measurably enhance the quality of record reproduction! Each one of its 10,000 conductive carbon fibers is positively grounded to discharge ever-present static electricity from the surface of your records. This eliminates static clicks and pops, as well as the tracking distortion produced by the varying electrostatic attraction between the record surface and the tone arm.
What's more, the Dynamic Stabilizer incorporates Shure-developed viscous damping that results in a uniquely efficient suspension system which maintains precise cartridge-to-record distance and uniform tracking force even on severely warped records. The stabilizer also acts as a shock absorber to cushion the stylus in case you accidentally drop the tone arm onto the record.
Finally, the tiny carbon fibers are so fine that 10 of them can fit inside a single groove to sweep free minute dust particles.
This integrated approach to pure sound reproduction extends throughout the design of the V15 Type IV.
It sets a new standard of high trackability at ultra-low tracking forces-even on records that are warped, dusty, and charged with static.
If faithful reproduction of all your recordings is of paramount importance to you, we invite you to audition the V15 Type IV with the Dynamic Stabilizer. Or, write for the complete story (ask for AL569).
V15 Type IV...the stabilized cartridge
Shure Brothers Inc., 222 Hartrey Ave, Evanston, IL 60204, In Canada:
A. C. Simmonds & Sons Limited Manufacturers of high fidelity components, microphones, sound systems and related circuitry.
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FROM THE SOURCE FROM ONE OF THE COUNTRY'S BIGGEST DISCOUNTERS OF STEREO EQUIPMENT FROM ONE OF THE FASTEST MAIL ORDER HOUSES FROM DISCOUNT SOUND! Toll-Free 800-638-6666 RECEIVERS
2238 38 watts per channel, 0.08% THD $228 TURNTABLES Dual CS-1237 Belt drive changer complete $119 SPEAKERS
HD-880 4 speaker system, 12" woofer, rated #1 TAPE DECKS (1.0 PIONEER CT-F1000 1JJ "C):, g A' c AMPS Sansei AU-717 Top of the tine 85 watts per cassette deck $391 channel, DC amplifier
$353 Technics by Panasonic SA-500 55 watts per channel, 0.04% THD Technics by Panasonic S L-3200 Direct Drive turntable, semi automatic N1 PIONEER' H PM-40 3 speaker system, 10" woofer $86ea.
AKAI CS-702D I
Front load cassette deck $140 LUX 1180DC 90 watts per channel, DC amplifier AKAI AA-1135 35 watts per channel $194 SANSUI G-9000 160 watts RMS per channel, AM/FM Receiver $695 DYNACO SE-10 KIT 10 band equalizer $182 STANTON 681EEE Magnetic Cartridge $40 GARRARD GT-55 Belt drive changer, magnesium tonearm $138 discount sound AKAI AA-1115 15 watts RMS per channel, AM/FM Receiver .. $136 SANSUI SC-3110 Rack mountable Cassette Deck $318 MARANTZ 7 MKII 3-way speaker system, 12" woofer $95ea.
SHURE M95ED Magnetic Cartridge $26
AKAI AM-2600 60 watts per channel, 0.1% THD $198 5618 RANDOLPH RD., ROCKVILLE, MD. 20852 All orders shipped immediately Phone orders accepted Use your Bank Americard or Master Charge Call or write for price quotes on all the top audio brands Write for free catalog All merchandise in factory sealed cartons with full manufacturer's warranty.
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MIDNIGHT DREAM components
Hear your dream music on the dream system: black Optonica components in the dark.
Fly up through soft and smoky clouds into a dream of midnight music, where smart black machines pour out high fidelity fantasies.
A passing cloud carries the gleaming ebony dream deck: the Optonica RT-6505.
At least a dozen of its switches control an endless range of recording and playback functions, governed by a small (and very intelligent) computer.
Now here's your new amplifier, equally black, with softly glowing output meters that allow you to monitor output power (in watts or dB) for purity of sound and safety of speaker systems.
Next is the new ST-3205 tuner, with precise air check calibration for accurately pre-set recording levels.
A receiver sails by: the SA-5605, with Opto-Lock tuning, Delta Power, midrange tone adjustment and tuner cutout for disc-to-tape transfers.
A favorite record spins on the new Optonica RP-7505 turntable: direct-drive, full automatic, with unique metal/resin base that eliminates resonance problems.
Now your speaker systems: Optonica CP-51511's.
If the highs you hear seem especially pure, it's because of a tiny metal ribbon tweeter that's about as heavy as the wing of a medium-sized butterfly.
It all comes together to create the kind of astonishingly beautiful sound you might very well hear in tonight's midnight dream.
But why wait until dark? Visit an Optonica dealer and listen to the Optonica dream system, black as midnight, in the bright light of day.
OPTONICA THE OPTIMUM. Keystone Place. Paramus, NJ 07652
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The Eumig CCD.
Opto-electronically engineered for absolute recording excellence.
Eumig, one of the worlds leaders in electro-mechanical research and development, has Introduced a revolutionary new technology to cassette recording. It's the OPTO-ELECTRONIC SERVO CAPSTAN DRIVE SYSTEM incorporated in the unique Eumig CCD. This technology offers so many advantages that the Eumig CCD will out-perform every other cassette transport.
Ultra-Precision: The unique Eumig photo disc Other decks use old-fashioned belts and flywheels to control the capstan. In the Eumig design these are replaced by a light weight disc, photo-etched with 2500 radii, spaced precisely I/50mm apart. When rotated, these radii create 15.000 pulses per second for instantaneous optically-sensed speed corrections. Wow and flutter is a mere 0.05% WRMS, and speed accuracy is ±1%.
The Eumig photo disc weighs about 1/70th, as much as a typical flywheel. When combined with an almost inertia-free, coreless drive motor, the CCD offers a startup time of less than 0.04 seconds, which means you never hear the wowing sound after a pause in recording. And the CCD boasts the fastest rewind time in the world-an astonishingly low 40 sec. (C-60).
Rugged reliability The Opto-Electronic Servo System is only one among many dramatic advantages of the Eumig CCD. It offers three precision heads of our own design, mounted in a die-cast aluminum carrier made at our own facilities (as are virtually all parts of the CCD), for greatest precision. The Eumig CCD is engineered th cirtuitboar' s ra than wires, tor utmost reliability Advanced technology features The comprehensive features of the CCD reflect Eumig’s innovative technological approach. Two parallel LED displays allow simultaneous monitoring of both channel levels. Full sole noid/MOS logic is operated by feather-touch controls with logic-programmed LED indicators, and the flexible two-input mixing facilities use strictly DC controlled circuitry.
Perfect recording every time Perfect performance is guaranteed with every type of tape be cause the Eumig CCD offers virtually flat frequency response to 20,000Hz (chrome); Dolby calibration adjustment for different tape sensitivities; and an azimuth adjustment to optimize high frequency performance with each and every tape.
The Eumig CCD. probably the finest deck in the world, is now available for $1300, including full-function remote control, at select audio outlets throughout the country. Write to us for the name of the dealer nearest you. Then listen and compare. We believe you'll agree-it's incomparable.
Eumig ( USA) Inc., Lake Success Business Park, 225Community Drive, Great Neck, New York 11020, (516) 4664533
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The perfect pair.
The new Koss CM/530 bookshelf speakers with the perfect mirror-image sound.
Here is truly a remarkable achievement in loudspeaker design and performance. The Koss CM/530 bookshelf loud speaker sets an entirely new standard in extended band width response, high efficiency, low distortion and perfect mirror-image for speakers in its size and price range and within today's technological capabilities.
------- No matter how you place them on your bookshelves, you get perfect mirror-image sound.----
By designing a left and a right channel configuration for the passive radiator, the woofer and the tweeter, Koss engineers CC) CR) have created a perfectly matched set of bookshelf speakers that can be placed horizontally or vertically without losing the perfect right to left imaging, an incredible degree of dispersion and the beautiful Sound of Koss.
To create the breathtaking depth and clarity in the CM/ 530, Koss engineers used an 8-inch passive radiator to radiate the sound energy over the lower two octaves. This allowed them to use an 8-inch woofer to re produce the critical sounds in the midrange up to 3,000 Hz.
In addition, the CM/530's 1-inch dome tweeter reproduces an exceptionally flat energy output and unusually low distortion that provides for a transparency and liveliness not found in other competitive speakers.
Ask your Audio Dealer to give you a live demonstration of a matched pair of bookshelf speakers. You'll be amazed at their perfect mirror-image sound. And while you're at it, try the perfect answer to private listening: Koss stereo-
phones. But by all means, write, c/o Virginia Lamm, for our full color speaker and stereophone catalogs. The Sound of Koss will do great things for your records or tapes . . . and your image.
1978, Koss Corp. KOSS
CM/530 BOOKSHELF SPEAKERS hearing is believing
KOSS CORPORATION, 4129 N. Port Washington Ave., Milwaukee, WI 53212.
International Headquarters: Milwaukee/facilities: Canada France Germany Ireland Japan
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Nortronics Liquid Tape Head cleaner removes impacted dirt particles and oxide deposits that naturally accumulate on the surface of your tape recorder's working parts.
It cleans dirty heads, but it is also completely safe to use on all of your recorder's plastic, rubber or metal parts. And it leaves absolutely no residue. Look for it, along with your free copy of our 36-page Recorder Care Manual, in your audio dealer's showroom.
Recorder Care Division, NORTRONICS.
Nortronics Company, Inc.
8101 Tenth Ave. North, Minneapolis, Minn. 55427 We make things right.
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A lot of music for your money, not a lot of money for your music.
Lafayette's Criterion Series 2000.
The Criterion Series 2000 Speakers are Lafayette's best sellers. And it's easy to hear why.
All 3 speakers feature a 3-way bass reflex design for greater efficiency. (Acoustic suspension systems waste a lot of the power your amplifiers put out).
The Series 2000 have foam-edged woofers for deep, linear bass response (the woofer in the 2003A is a healthy 15 inches big!) and exponential horns to deliver vocal, brass and guitars with sharp, realistic punch.
There are 2 separate controls to adjust the high and mid-range response to your own taste and your room's acoustics, and circuit breakers to protect your investment.
The 2002A and the 2003A have two 2" phenolic ring tweeters that are angle-mounted for greater dispersion--so you hear all the highs in every corner of the room.
Another thing: we think speakers should look as good as they sound, so we paid extra attention to every detail. We even put the wood grain vinyl on the front as well as the sides, in case you want to leave the grilles off.
The Series 2000 Speakers combine Lafayette high quality with Lafayette low price.
See them, hear them, price them at any Lafayette showroom.
FREE 1979 CATALOG. Lafayette's catalog is all new for 1979!
172 illustrated pages--over half in full color. Features everything Lafayette makes or sells. Write Lafayette Dept. No. 11128, 111 Jericho Turnpike, Syosset, N.Y. 11791. Allow several weeks for delivery.
The perfect place to improve your hearing.
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Scott's new 390R is perhaps the most complete receiver ever made.
A professional control center for your entire sound system, the 390R delivers a full 120 watts per channel min. RMS, at 8 ohms from 20-20,000 Hz with no more than 0.03% THD. And it offers more options, features and flexibility than you'll find on most separates.
Compare the Scott 390R with any other receiver on the market day. If you can find one that does more ... buy it.
The Name to listen to.
Makers of high quality high fidelity equipment since 1947.
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SAE
LEVEL BANDWIDTH
With the graphic equalizer, you have a limited number of chances to correct an infinite number of potential problems in a recording or listening environment. You're dealing with fixed bandwidths and fixed frequencies. You can only increase or decrease the level. When boosting or cutting frequencies, you have to settle for the nearest one or two octaves. It's a FREQUENCY compromise. With the parametric, you're provided an infinite number of solutions. Bandwidth, frequency and level are each determined by you. Any musical problem can be isolated and corrected. Any. And all. And that's what all the excitement's about.
The graphic reason to buy our parametric.
At SAE, the battle has always been for complete musical control. Control that would allow you to correct for any inadequacy in any recording or listening environment.
Now the battle is over. You won.
SAE introduces the 180 Parametric Equalizer.
Actually, if you work for a recording studio, "introducing" would hardly be appropriate. You'd be working with parametrics already. Very simply, it's a matter of flexibility and precision. And very simply, with the SAE 180, the flexibility and precision of your sound control are absolutely limitless.
We should let the parametric speak for itself.
Problem: The lead singer is overpowered by the back-up group.
Solution: Set Level control to +10dB. Sweep Frequency control until the voice is brought r forward. Adjust Bandwidth control to encompass the full voice range. Tailor Level control to exact voice presence desired.
How much does a machine like this cost? How can I afford a component that can acoustically correct a system? How can I buy an electronic box that can fix a listening room and a recording at the same time? The SAE 180 costs $250. That's how.
What we have is a I want control. Send information.
SAE, P.O. Box 60271, Terminal Annex, Los Angeles, California 90060 I small miracle that is also an attainable reality.
Imagine: Complete, precise, musical control for the price of a common graphic.
Remember that word:
Parametric. Remember that number: 180. And remember that name:
SAE.
Nationally advertised value, actual retail prices are established by SAE Dealers.
Scientific Audio Electronics, Inc.
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Unlike any stereotype, Nikko Audio actually delivers the seed of sound in our professional series.
The Gamma V Synthesized FM Digital Tuner has a LED read our showing locked-in MHz numbers. Accuracy on the button.
The EQ 1 Graphic Equalizer shapes the acoustics of your room into a recording studio.
The Alpha Ill Power MOS-FET DC Amplifier has the lowest THD anywhere near the price range-0.008% (80 watts per channel, both channels driven into 8 ohms, 20 Hz to 20 kHz).
Call our roll-free number for your nearest Nikko dealer: (800) 423-2994.
Nikko Audio 16270 Roymer St., Van Nuys, CA. 91406(298) 988-0105
In Canada: Superior Electronics, Inc. Nikko Audio 1978
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WHO WANTS A SPEAKER WITH PRESENCE?
Nobody should. What you want in a speaker is absence. Absence of anything between you and the disc or tape you are playing.
If you can actually hear your speakers they aren't good enough. They should be adding nothing to the sounds you hear. That goes for boomy bass (which instead should be clean, crisp and pure)...for lost signals in the middle of the range
...and for tweeters (which shouldn't sound harsh).
For a new listening experience, compare the Emanation ES-4 with speakers costing much, much more. You'll find out how beautiful absence is.
Or try any of the other fine speakers from Emanation, ranging from the very affordable ES-1 to the extravagant ES-6.
Emanation Sound Inc., 146 Olive St., New Haven. CT 06511 (203) 865-4087
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The Receiver. Every bit as revolutionary as they look, and then some.
In our case, looks are never deceiving. Because all our new DC integrated stereo receivers, combine unprecedented, revolutionary styling with unique electronic design features that reflect JVC's more than 50 years' experience in audio development and innovation.
DC Power Amplifier Design
All four new JVC receivers feature DC amplifier circuitry. They offer virtually distortion-free performance (0 03% THD) throughout the entire audible spectrum As a result, the sound you hear is clearer, cleaner and crisper In addition, your speakers are protected with the Triple Power Protection circuit and you can monitor output wattage with dual power meters Choose from 120, 85, 60 and 35 watts/ channel.* SEA all the way All four receivers offer JVC's exclusive built-in SEA five-zone graphic equalizer for more complete control of the music spectrum than conventional tone controls You can attenuate or accentuate any of five separate musical bands, and as an added feature, we've incorporated a special button so that the SEA circuit can be switched to your tape deck Pushbutton Source Selectors A horizontal panel of pushbuttons provides total control over all functions And brilliantly illuminated LEDs instantly , indicate the program source
Professional- .
type slider controls set volume and balance Combine all these exclusive features with high sensitivity and tuning precision, thumb control tuning wheel and accurate dual-metering and you'll see just how revolutionary the new JVC DC integrated stereo receivers are Play one at your JVC dealer soon JVC High Fidelity Division, US JVC Corp , 58-75 Queens Midtown Expressway, Maspeth, NY 11378 In Canada JVC Electronics of Canada, Ltd , Ont 7 JR-9 401 (top), JR-9 201 (bottom Ieft) & JR-9 301 (bottom right)
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When was the last time you hummed a catchy specification? Our new receivers have superb specifications.
But so do many other receivers.
What makes us better is the way we sound. More musical, with air between the instruments. Spacious, with extraordinary articulation that allows each instrument to register deep into your musical consciousness.
Why do our receivers sound that way? It starts with ultrawideband frequency response and remarkably low TIM (transient intermodulation distortion) and SID (slewing induced distortion). But these are merely minimum design parameters for our engineers.
Of course, it is possible to build adequate receivers where others build them--in the laboratory. But that's not where you build exceptional ones. You make them in the listening room.
harman/kardon
Hear all the music.
55 Ames Court Plainview NY 11803 The fact is that transistors with the same specifications, but from different manufacturers, vary in ways that affect the texture of music. That's why our engineers actually listened for the musical character of every component--singly and in combination--that went into the audio chain of all cur new receivers. Every transistor. Every capacitor. Every resistor.
They listened for the subtle differences in component parts that make the immeasurable differences in the final product--changing, refining, in effect tuning the instrument until a receiver emerged that sounded exactly the way they wanted it to sound.
In short, we care a lot more about our great sound than about our great specifications.
Come listen. Guaranteed, we'll give you something to hum about.
Pictured: h k670 receiver 60/60 watts Not shown : hk340 20/20 watts, h k450 30/30 watts, h k560 40/40 watts
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Introducing the home stereo receivers for your car.
VOLUME BASS S TREBLE Individual Bass & Treble Controls.
Power Amplifier.
Separate power amp installs in trunk. Provides up to 60 watts of Total System Power.
Bi-Amplification.
Divides and sends correct frequencies and power levels to respective drivers through four separate amps (two for highs and two for lows).
Recaptures all the bass that can disappear at low volume levels.
Eliminates inter-station noise when changing stations.
Dolby Noise Reduction.
Processes out tape hiss on Dolby-encoded tapes;
improves dynamic range of Dolby-encoded FM broad casts.
The Jensen Car Stereo Receivers.
At long last...Jensen introduces the Stereo Receiver for your car. In dash.
A series of six stereo receivers: Three with cassette.
Three with eight-track. All featuring incredible wide range tape reproduction and monitor quality FM broadcasts with superior sensitivity and pin point selectivity.
At the very heart of Jensen's Car Stereo Receivers can be found four independent, direct coupled amplifier sections-two for each channel.
Several models even boast the electronic sophistication of bi amplification which minimizes distortion and increases peak power levels.
Feather-touch electronic switching puts the receiver through its paces: Dolby Noise Reduction System, Loudness Compensation, Switchable Interstation Muting, Tuner On/ Off and Local/Distant reception.
These are some of the features that have created a distinct new category: Car Stereo Receivers. The same features and quality that have earned these receivers the Jensen name.
For a free full color brochure on the family of six Jensen Car Stereo Receivers, write:
JENSEN SOUND LABORATORIES. Division of Pemcor, Inc.
4136 North United Parkway Schiller Park, Illinois 60176
Dolby and "Dolby System" are Trademarks of Dolby Laboratories, Inc.
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"Enormously Efficient"
The computer-optimized Wharfedale E's. Beautifully designed and crafted. For the sophisticated connoisseur of sound.
Unusually efficient (94dB/W/m), the E's are clean and easy-to-listen-to, with notably good transient response.
Distortion is inordinately and inaudibly-low.
"Exceptionally flat..." Response is wide and flat (50-18,000 khz, ± 3dB for the E-70), with exceptional bass performance.
That's why audio experts acclaim the E's. Why audiophiles adore them.
The Wharfedale E-70's and E-50's come in matched, hand-finished, walnut-veneer pairs. Audition the E's and our complete line of high-quality loudspeakers at your Wharfedale dealer today.
We know you'll be enormously impressed.
WHARFEDALE-- RANK HIFI Inc. 20 Bushes Lane. Elmwood Park, New Jersey 07407. 201- 791-7888
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TRY THE MARANTZ PIVOT TEST. YOUR EARS WILL NEVER KNOW OUR LOUDSPEAKERS MOVED.
By using a simple test you can prove to yourself that Marantz loudspeakers deliver the same brilliant sound separation over the widest possible listening area:
Here's the test:
Have your Marantz dealer place any pair of Marantz floor standing loud speakers in a normal listening position.
Now, listen as your selection of dynamic music is played through the Marantz loudspeakers. Notice the three dimensional quality of the sound.
Now close your eyes and have two people slowly turn the Marantz loud speakers until they're actually facing each other.
Did the sound change? In almost every case we've found the listener cannot hear a change in the sound ... because there isn't any! Even with the loudspeakers facing each other. Incredible! But if you try the same test with most conventional loudspeakers you'll notice a striking difference. The sound literally falls apart. You'll hear a loss of overtones-sparkle and brilliance all the qualities that make music open and spacious disappear.
WHY MARANTZ PASSED THE TEST WHILE OTHERS FAIL.
In a nutshell: Constant Radiated Power (CRP)- 180 degrees dispersion regardless of frequency. To achieve CRP we consider both the frequency response and dispersion characteristics of each individual transducer in the system; woofer, midrange and tweeter.
The result is a unique design approach incorporating three important performance parameters:
1. We know that dispersion is deter mined by the diameter of the radiating surface-the speaker cone-and the frequency being reproduced. So we pick the precise frequency at which each individual driver radiates 180 degrees and use this as the crossover point.
But many manufacturers often cross over at a frequency where, for example, the woofer's dispersion has already started to beam. Why? They may be trying to save money by using cheaper transducers and crossover networks. Or, perhaps they consider CRP to be unimportant. But you won't!
2. Our transducers are positioned on the baffle to ensure the best possible dispersion.
Other manufacturers may position their driver for eye-appeal, but that's not good enough for Marantz.
3. To control transition between our drivers, we use the most sophisticated, best thought-out crossover networks ever developed.
As you can see from the illustration below (Fig. A), wherever you are in the room you hear the same ideal stereo separation and 180 degrees dispersion pattern. Notice how the other speaker "beams" certain frequencies in a narrow corridor (Fig. B). Unless you sit directly in front of those speakers, you lose part of the music.
TRANSDUCERS YOU'D EXPECT FROM A WINNER.
Wide sound dispersion alone doesn't guarantee sonic accuracy. You also Tone burst test demonstrates superior low stored energy characteristics of Marantz loudspeakers.
Original signal. Note instant start/instant stop of trace.
Marantz loudspeaker.
Note close similarity to original signal.
Competitor. Note overhang caused by inability of cone to stop vibrating.
need transducers that exhibit low distortion and low stored energy.
Stored energy is the continued vibration of a loudspeaker's radiating element after the driving force has stopped. It can exist in any loud speaker; woofer, midrange or tweeter, and is heard as a smearing or running together of the individual instruments.
To assure Low Stored Energy, Marantz uses extremely rigid cones and domes tightly coupled to the voice coil to create a homogeneous rigid structure. Accurate control of this structure is then assured by an extremely powerful magnetic motor assembly. The result is that Marantz transducers move as a unit in a smooth, piston-like motion without the slightest hint of cone break-up or flexing-even under the most rapid acceleration and deceleration! You hear precise, sharp instrument definition truest musical sound possible wherever you are in the room! Your Marantz dealer has the full line of Marantz speaker systems. If you truly want the best-and are willing to spend a little more to get it-then go for it. Go for Marantz.
1978 Marantz, Co., a subsidiary of Superscope, Inc., 20525 Nordhoff St., Chatsworth, CA 91311.
------------- The Marantz speaker disperses all the frequencies 180 degrees.
Conventional speakers tend to narrow certain frequencies.
In actual test, speakers should be placed the same distance apart as you are away from them.
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Also see:
Digital Mastering--A Progress Report (Jan. 1979)
Turntables -- What Are Your Options (Jan. 1985)
TECHNICAL TALK--Cartridge Measurements--Read with Care! JULIAN D. HIRSCH
Source: Stereo Review (USA magazine)