Transcriptors "Vestigal" Tone Arm
TRANSCRIPTORS (Ireland) Limited is importing the "Vestigal" Tone Arm, a new design employing a vertical pivot assembly located very close to the phono cartridge to reduce effective tone arm mass in the vertical direction as much as possible. Balancing the arm and applying stylus force is accomplished through a string-and-weight system, with the string running the length of the arm from the hinged cartridge shell to the tone-arm upright. There it is attached to a pivoted drum that keeps a constant tension on the string. The amount of tension is determined by an adjustable counterweight that moves along a threaded shaft attached to the drum's circumference.
Other adjustments provided for include means to bring the horizontal rotation of the arm parallel to the disc surface, height adjustment, stylus overhang, anti-skating compensation, and a stop to keep the arm from swinging into the la bel area of the disc. The low effective mass of the arm is claimed to result in negligible susceptibility to acoustic feed back or record-warp effects, and it is further claimed that tracking forces as low as 1/10 of a gram may be attained. The arm is of all-metal construction, and uses jewel-bearing pivots throughout.
Price: approximately $100.
ADC Model WDDS-12 Speaker System
AUDIO DYNAMICS CORP. has a new speaker system, the Pritchard WDDS 12 (the initials stand for "wide dispersion/discrete source"). The system is a multidirectional radiator, with the woofer (a 12-inch air-suspension type) facing directly forward and the tweeters, of which there are four, angled slightly to either side on subsections of the enclosure's three-part front panel. Two types of tweeters are used, both having Mylar dome diaphragms, but with diameters of 11/2 and 3/4 inches. One of each type is mounted on either side of the enclosure.
Frequency response is 30 to 25,000 Hz ±2 dB, and varies no more than 3 dB from on-axis response over a lateral angle of 120 degrees. Crossover between the woofer and tweeters takes place gradually over the range of 600 to 5,000 Hz. The nominal impedance of the system is 6 ohms. A four-position contour switch offers a choice of flat response, high or mid frequencies reduced by approximately 2 1/2 dB, or both reduced by that amount. The Pritchard system has a sealed enclosure of oiled walnut with a foam grille. Dimensions: 26 x 14 1/2 x 12 inches. Price: $350. An optional pedestal base (shown) finished in matte-black aluminum is $25.
Dokorder MK-50 Dolby Cassette Deck
A NEW stereo cassette deck has been introduced by Dokorder. The Model M K-50 has Dolby B-Type noise reduction, a tape selector with positions for "normal" and chromium dioxide, and a "Cue & Review" function that permits direct switching from play to fast for ward and rewind (to assist in locating specific points on the tape). Slider-type adjustments are used for setting recording and playback levels; these are separate for each channel. Push-key trans port controls are provided, including pause and eject functions. The micro phone inputs and a stereo headphone jack are recessed into the trim strip on the deck's front edge. Frequency response is given as 30 to 15,000 Hz with standard tape and 30 to 18,000 Hz with chromium dioxide. Signal-to-noise ratio is better than 60 dB with Dolby, 50 dB without; wow and flutter are under 0.1 percent. A C-60 cassette can be fast wound in less than 100 seconds. Dimensions of the deck are 16 x 11 3/4 x 4 inches. Price: $249.95. A wood base is included.
Heathkit AD-1013 Four-Channel Audio Scope
HEATH'S new four-channel audio scope consists of a 3-inch cathode-ray oscilloscope with inputs for up to four audio channels and for an FM multipath display, plus a self-contained audio-frequency generator to provide test and calibration signals. The multifunction instrument is housed in a cabinet that matches the size and general styling of the Heath AR-1500 receiver. The scope's display modes, which are chosen by an eight-position selector switch, include signal-strength vectors for each of the four channels (which can be selected separately) and the familiar "scrambled-egg" pattern for stereo. For displaying all four channels simultaneously, an internal circuit assigns each of the inputs its own quadrant on the scope screen.
The FM multipath display, which is also useful for determining signal strength and channel center, receives its input from tuners and receivers that have the appropriate oscilloscope outputs. (An adaptor kit that adds these jacks to the Heath AR-15 receiver or AJ-15 tuner is available from Heath for $24.95.) The AD-1013 will also function as a normal a.c. scope (with triggered sweep) for inputs connected to the five-way binding posts on the front panel. Sweep range is selected by a four-position decade switch and an associated continuously variable control. The audio-generator section is continuously variable and roughly calibrated at eight important frequencies from 20 to 20,000 Hz. Out put is held constant within 0.25 dB over the range covered, and the level control affects the signal available from the front- and rear-panel output jacks. The AD-1013 also has trace-position and gain controls (vertical and horizontal) and focus and intensity adjustments. The sensitivity of the oscilloscope is 25 milli volts (peak to peak) percentimeter (1 volt percentimeter in the four-channel display mode). Input impedance is 100,000 ohms, and the frequency response is 5 Hz to 200 kHz ±3 dB. Overall dimensions of the AD-1013 are 18 1 1/2 x 5 1/8 x 13 1/2 inches. It is available only in kit form for $199.95, with a walnut cabinet costing $24.95 additional.
BSR Model FEW-2 Frequency Equalizer
THE Metrotec division of BSR is offering a new addition to its line of multi band tone controls. The Model FEW-2 acts in five two-octave bands with center frequencies of 60, 240, 1,000, 3,500, and 10,000 Hz, with a continuously vari able amplitude adjustment range of ±12 dB at each setting. It is a stereo device, with separate slider-type controls for each channel. Tape-monitor jacks and switching are provided to retain these facilities for any system in which the unit is installed in the tape-monitor loop.
The equalizer has less than 0.007 percent distortion and a signal-to-noise ratio of 80 dB. Input impedance is 75,000 ohms, with a 10-ohm output impedance.
The built-in amplification stages provide approximately unity gain. The maximum output is 9 volts. The unit is supplied with a wood cabinet and a translucent flip-down front cover that protects the control settings from being accidentally disturbed. Dimensions are 8 3/8 x 4 5/8 x 5 1/2 inches. Price: $99.95. Other BSR equalizers scheduled for introduction soon are a stereo unit with twelve bands per channel (Model FEW-3) and a four-channel version of the FEW-2.
Pioneer SX-1010 AM/Stereo FM Receiver
PIONEER'S most powerful stereo receiver, the new SX-1010, is capable of 100 watts continuous output per channel (8-ohm loads, both channels driven simultaneously) at any frequency from 20 to 20,000 Hz. Its special operating features include two sets of step-type bass and treble controls acting at 50 and 100 Hz (bass) and 10,000 and 20,000 Hz (treble), two magnetic-phono inputs, and connectors and switching for two stereo tape decks (with dubbing possible from one to the other). There is also switching to accommodate an external Dolby noise-reduction unit, and a four-channel adapter. A tone-control DEFEAT switch is also provided. The front panel has phone jacks for two stereo headsets and inputs for two microphones. Up to three pairs of speakers can be handled. The receiver has switchable FM interstation noise muting, 6-dB-per-octave high- and low-cut filters, and audio-muting.
Additional amplifier specifications for the SX-1010 include harmonic and intermodulation distortion of less than 0.1 percent at any power level up to rated out put and signal-to-noise ratios of better than 95 (high-level inputs) and 70 (phono inputs) dB. The FM section has an IHF sensitivity of 1.7 microvolts, a 1-dB cap ture ratio, 55-dB AM suppression, and stereo separation exceeding 30 dB from 50 to 10,000 Hz. Image, i.f., and spurious-response rejection are all 110 dB.
Harmonic distortion for stereo reception is under 0.3 percent. The SX-1010 has approximate dimensions of 20 1/2 x 7 x 17 1/2 inches. It is supplied with a walnut cabinet. Price: $699.95.
Ampex Pre-recorded Tape Catalog
A COMPLETE listing of the Ampex line of prerecorded tapes for 1974 is now available in the form of a sixty-four-page mail-order catalog. All tape formats are represented, on such labels as Deutsche Grammophon, London, Philips, Van guard, RCA, Blue Thumb, Buddah, Kama Sutra, Mercury, Motown, Project 3, and over one hundred others, for a total of more than 1,500 selections, some of which are available in four channel or with Dolby B-Type noise-reduction encoding. A special section is devoted to open-reel tapes, which are becoming difficult to find in retail outlets.
The catalog is offered as part of the Ampex Shopper's Service, which makes the company's complete line of consumer tape products available on a mail order basis, with no membership fee or minimum purchase required. Supplementary mailings keep customers up to date on new Ampex releases, and discounts on tapes are offered periodically.
The mail-order service honors major credit cards. The catalog is free from:
Ampex Catalog Offer, Dept. A200 SR, Box 178, Elk Grove Village, Ill. 60007.
CTS Loudspeaker Catalog
CTS, one of the largest suppliers of "raw" loudspeakers to the audio and musical-instrument industries, has pre pared a seven-page catalog describing the fifty-five models available directly to consumers from CTS retail dealers.
Among the "high-fidelity" models are tweeters, mid- and full-range drivers, and woofers ranging in diameter from 8 to 12 inches. All of these are cone-type units, with nominal impedances of 8 ohms. Also listed are speakers for such special applications as public address, car and aircraft installation, and musical-instrument reproduction. CTS also offers 12- and 15-inch "heavy-duty" drivers in full-range and woofer models, with exceptionally high sensitivity and power-handling capabilities of 100 watts continuous.
For those interested in complete speaker systems, the catalog lists ten recommended designs (in one-, two-, and three-way configurations) based on CTS components. These can be purchased as system "packages" containing drivers, crossover-network components, wiring diagrams, and recommended enclosure dimensions. (The purchaser can build the enclosures or adapt existing ones.)
The catalog is available free of charge at CTS dealers or by writing: CTS of Paducah, Inc., Dept. SR, 1565 North 8th Street, Paducah, Ky. 42001.
==================
Vintage magazine ADs:
The fluid and brush are designed to have a precise working relationship as a fully integrated record cleaning system. And while is chemically tailored to solubilize common dirt and debris on your records' surface, the formula was also developed to handle the newest problems of the record user-crystallized manufacturing lubricants.
Both components of the Discwasher system can stand on their own merit: an improved directional pile brush which lifts off rather than pushes around. And the fluid which is a chemically sophisticated product resulting, from years of research.
But together, the relationship exceeds the expectations of the most critical audiophile. The relationship should he working for you.
Send 25 a self-addressed stamped envelope for our Technical Bulletin Clean Records and Chemistry, to lid out what's happening to your records today. Discwasher, Inc., 909 University, Columbia, Mo. 65201.
discwasher INC, COLUMBIA MO.
IMPORTANT: KEEP OUT OF REACH OF CHILDREN
-----------------
Incredible.
Sorry, but when it comes to our new Phase Linear 4000, modesty fails us..-low else would you describe a preamplifier that actually:
Puts back in what recording studios take out.
Restores dynamics lost in recording to closely approximate the original.
Vanishes into virtual inaudibility all hum, noise and hiss inherent in most tapes, records, and FM broadcasts.
Lets your music (at last) reach a life-like level where cymbals sound like cymbals, kettle drums like kettle drums.
Lets you ... for the first time ...
hear your music from a silent background.
Since its introduction follows the Phase Linear 700 and 400 power amps, the 4000 pre-amp had to be good. Consider these features:
The Peak Unlimiter
To prevent overload in recording equipment, studios today "peak limit" high-level explosive transients of the source material. Incorporated in the Phase Linear 4000 is a highly-advanced circuit that reads peak limiting, immediately routes the signal through a lead network, and restores dynamics lost in recording to closely approximate the original.
The Downward Expander
Gain riding, a recording technique used to improve low level signal to noise on phonograph discs, unfortunately comprises the dynamic range that available. The 4000 senses when gain riding has been used and immediately expands the dynamics reciprocally downward to precisely the intended level.
The AutoCorrelator
The advanced Autocorrelation Noise Reduction System in the 4000 makes record/tape hiss and FM broadcast noise virtually vanish ... without effecting musical content of the source material. Over-all noise reduction is-10 dB from 20 Hz to 20 kHz. Your music comes from a background that is silent.
Plus ...
. . . the 4000 is an advanced stereo preamp with SQ and Phase Linear differential logic ... its Active Equalizer gives you a truly flat energy distribution over the full audio spectrum ... completely passive, independent Step-Tone Controls allow precise tailoring of the music to your listening environment.
It is, in a word, incredible. Ask your dealer for an audition.
PHASE LINEAR 4000
SPECIFICATIONS
Total Distortion: Less than .25%.
Typically .02%.
Total Noise: High level: 95 dB below full output.
Phono: 82 dB below full output.
Tone Controls: Bass: Monotonically increasing and decreasing, dual hinge points, ± 8 dB @ 20 Hz. Hinge points switch selectable beginning at 40 Hz or 150 Hz. Treble: Monotonically increasing and decreasing, dual hinge points, ± 8 dB @ 20 kHz. Hinge points switch selectable beginning at 2 kHz and 8 kHz.
Active Equalizer: 6 dB/octave boost below 50 Hz.
Peak Un-limiter: (Nominal peak un-limit rate attack threshold, front panel variable) .5 dB/micro second for + 6 dB peak unlimited operation.
Downward Expander: Downward expansion commences at -35 dB.
Ultimate limit is -41 dB. Unlimiter window is 35 dB wide, upper and lower thresholds are simultaneously variable.
Auto Correlator (Noise Reduction Systems): High frequency noise reduction commences at 2 kHz and is 3 dB, reaching 10 dB from 4 kHz to 20 kHz.
Weighted overall noise reduction is-10 dB from 20 Hz to 20 kHz.
Size: 19" x 7" x 10"-Weight: 18 lbs.
Price: $599--Cabinet: $37 Warranty: Three years, parts and labor.
THE POWERFUL DIFFERENCE . SQ is a trademark of CBS Labs, Inc. PHASE LINEAR CORPORATION, P.O. BOX 549, EDMONDS, WASHINGTON 98020.
-------------------
THE EMPIRE INDOOR / OUTDOOR SPEAKER SYSTEM
NEW JUPITER 6500
Our indestructible 25 inch high enclosure is made of space-age acoustic materials with a marproof surface. The speaker drivers are completely weather-proofed to tough military specifications.
The Jupiter's perfect three-way system uses Empire's heavy 12 inch down facing woofer for bass so powerful you can feel it as well as hear it. Best of all, the sound radiates in all directions: front, rear, left and right.
Available at better hi fi dealers.
List price an unbelievably low $149.95.
For your free "Guide to Sound Design" write:
EMPIRE SCIENTIFIC CORP., Dept. FF
Garden City, N.Y. 11530. Mfd U.S.A.
------------------------
The new Micro-Acoustics QDC-1 Stereo Phono Cartridge:
It will make any well-recorded LP sound exactly like its master tape.
Recently at a trade show in Chicago, we invited audiophiles to compare a master tape with a stereo disc cut from the tape. The tape and the disc were played through the same electronics and the same loudspeakers. The only difference was that a tape deck was used to play the 15 IPS master and a turntable with our QDC-1 Stereo Cartridge was used to play the commercial pressing. Without fail, listeners could not hear a difference between the disc and the master.
Actually it's not as incredible as it sounds.
People in the record business have known for a long time that a well recorded stereo disc is potentially every bit as good as its master tape. We make the Series 300 Micro-Point Recording Stylus-an ultra precision cutting tool used in record mastering.
(Over two-hundred million records a year are manufactured from masters cut with our Micro-Point Styli.) And it has been our experience that there's no problem in getting the music onto the record: the problem is in retrieving it.
The cartridge is the culprit.
Until the advent of the QDC-1, there really wasn't a cartridge on the market that could make a stereo record sound as good as its master tape. So cartridge manufacturers didn't have to deal with an absolute standard of measurement for their product. They sold their cartridges very much like loudspeakers, using subjective criteria. In the end, the customer had to choose between the "sound" of one cartridge or another. The fact is that a cartridge shouldn't have any sound of its own.
Ideally it should just be a direct link between the record groove and the preamp input. And that's precisely what the new QDC-1 is- an ultra precision component that will radically change the way all cartridges are judged. Now a cartridge's performance can be measured against a completely reliable objective standard.
Stated simply: Does a cartridge make a well recorded disc sound identical to its master tape? Or doesn't it? Ours does.
Hearing is believing.
The new Micro-Acoustics QDC-1 (Pat. Pend.) is available in spherical, elliptical and Quadra-Pointm/CD-4 configurations.
Prices range from $100 to $120. Frankly, we're not selling to every dealer and not every dealer we sell is doing our master tape/disc demonstration. But if it's been a long time since you were really excited by something new in stereo, we urge you to look for local ads announcing demonstrations in your area.
In the meantime, why not take a stereo LP of your own to your Micro-Acoustics dealer and let him show you what our cartridge can do for your records. We think you'll be startled by the difference.
For technical information and a dealer list, write to Micro-Acoustics Corp., 8 Westchester Plaza, Elmsford, New York, 10523.
In a MICRO-ACOUSTICS CORPORATION, ELMSFORD, NEW YORK 10523
---------------------
Dynaco
YOUR ULTIMATE AMPLIFIER
The Dynaco Stereo 400
It's all you've ever wanted in an amplifier. Power-400 watts at 8 ohms, 600 watts at 4 ohms; unsurpassed stability with any speaker; cooling capacity without equal; unmatched protection for both amplifier and speakers; and sound quality that draws raves from solid state and vacuum tube fanatics alike. A thousand square inches of heat sink--1.2 pounds of aluminum for each output transistor-plus space for an optional fan.
Relay DC protection, plus exclusive DYNAGUARD speaker saver and a host of additional safeguards make the Stereo 400 the most reliable, as well as the best sounding amplifier extant.
Optional illuminated meter kit - $75.
Build it in 3 or 4 evenings with Dynaco's easy step by-step instructions, and the simplicity of a single full color pictorial diagram.
Still dubious? Send $2.50 for the detailed manual.
$449 kit; $599 assembled.
Build the kit and save!
Division of Tyco Laboratories 3060 Jefferson Street Philadelphia, Pa. 19121
Also available in Canada from DYNACO OF CANADA, LTD.
Gentlemen: SR-6 Please send your new FREE full color Dynaco catalog of speakers and components.
Name Address City State Zip
-----------------------------
Telephonics
The Only Headphone with Full 4-Channel Separation
At long last, there's a quadraphonic headphone that really works: TELEPHONICS TEL-10ff. Based on a technological breakthrough (the "Fixler Effect") the TEL-101F Headphone provides the ambience, separation and realism That only true quadraphonic sound can give. And no other headphone on the market uses the "Fixler Effect!' It's, a Telephonics' exclusive.
Modern Hi-Fi and Stereo Guide said, "The new phones put the sound outside your head in a 360 degree circle, just as loudspeakers do!' In Popular Mechanics Robert Angus said, "Fixler Headphones- the only one we've found that really reproduces the 4-Channel speaker experience ... the sensation was exactly that of listening to a good four channel speaker array!' Angus also said in FM Guide's 4-Channel Forecast "Fixler has developed a technique for creating sound directly behind the listener, currently unobtainable with four channel headphones" FIXLER TECHNOLOGY The patented Fixler concept features specially designed drivers positioned so that the front and rear sounds pass the ear in realistic directions. For smooth, wide-range frequency response, the space between the drivers is filled with a selected foam-another Telephonics exclusive. To complete the design, the signals are judiciously mixed and separated to create a whole world of sound within two 4-inch earcups.
US PATENT 3609240 CONVERT STEREO TO 4-CHANNEL
Adding the TEL-101A QUADRAMATE to your "Fixler Effect" headphone lets you create 4-Channel sound/from your present stereo system. It's not as impossible as it seems. When a stereo recording is made, sounds reflected from the rear walls enter the microphones at different times and levels. To extract these reflected sounds and play them back through the rear head phone speakers, QUADRAMATE subtracts, adds, and mixes the stereo channels to let you hear reflected sounds from behind, where they belong.
To enjoy the full potential of your quadraphonic system, or to convert your stereo system to the quadraphonic sound, there's no substitute for the TEL-101F. It's the 4-Channel headphone designed by Fixler, and brought to life by Telephonics. The only one that really works.
Ask for Telephonics at your local dealer, or write our Sandy Curtis at 770 Park Avenue, Huntington, N.Y. 11743.
40 years of Audio Engineering Excellence
A Division of instrument Systems Corporation
-----------------------------
COMPLETE SET OF MATCHED STORAGE CASES
(A) 60-unit cassette case. 13 1/2" high x 12 1/2" deep x 5 1/2" wide.
(B) 30-unit cassette case. 13 1/2" high x 6 1/2" deep x 5 1/2" wide.
(C) 12-unit cartridge case. 1314" high x 6 1/2" deep x 414" wide.
Units A, B and C have tilted compartments to prevent spillage and include pressure sensitive labels for titling.
(D) 6-unit 7" reel case. 8" high x 7 1/2" deep x 5" wide.
Holds reels in original boxes.
(E) 20-unit 12" record case. 13 1/4" high x 12 1/2" deep x 3 1/2" wide.
Holds records in original jackets.
Here's the ideal solution to the problem of keeping your records and tapes stored conveniently and attractively. Now you can keep them side-by-side on your bookshelf or cabinet, easy to identify and readily available.
Sturdily constructed and covered in a handsome leatherette, the outer case is elegantly embossed in gold and comes in your choice of three popular decorator colors-black, brown and green-lending themselves readily to the decor of any room.
One Park Avenue, New York, N.Y. 10016
My remittance in the amount of $ is enclosed for the cases indicated.
Signature 60-unit Cassette Cases @ $15.95 each; 3 for $45.00 30-unit Cassette Cases @ $11.95 each; 3 for $33.00 12-unit 8-Track Cartridge Cases @ $7.95 each; 3 for $22.00 6-unit 7" Reel Cases @ $5.25 each; 3 for $15.00 20-unit 12" Record Cases @ $5.95 each; 3 for $17.00
Add 50c per unit ordered for postage and handling. Outside U.S.A. add $1.00 per unit ordered.
Payment must be enclosed with order if not
charged.
Check color choice for back of case (sides in black only): Brown Green Black
Print Name
Address City, State Zip
--------------------
ONKYO TS-500
The world's first and only Automatic 4-ch receiver.
Stack your 4-Ch. records in any sequence.
Sit back, relax and enjoy CD-4, SQ or QS (RM) Automatically! And, for that matter, any and all matrix systems that have been developed! This revolutionary instrument from Onkyo lets you hear it all with one switch setting-"Automatic" There's no confusion. No guess work about proper system choice. No control switching or resetting And, no deciphering of record jackets. Now, you can mix all of your 4-channel records in any sequence , . . and include your 2-ch. stereo discs. Then, sit back and immerse yourself in fine Onkyo sound. The secret is in Onkyo's logic and analog computer circuitry which Automatically demodulates and decodes any 4-ch. program in any sequence.
The TS-500 delivers 25W RMS power per chan. 8 ohm, 4-ch.
Artistry in Sound driven. It is BTL strapped for 2-ch. stereo at 50W RMS power, 8 ohm, per channel. A 4 channel balance control, continuously variable, provides ideal program balance.
And, you may use the manual switch control for selection of any individual 4-ch. mode. All functions, 4- Ch. and Stereo. Automatically light up on the dial for at-a-glance convenience. The TS-500 features differential and direct coupled amplifier circuitry to assure superb response and broad power bandwidth. FM sensitivity and selectivity are unparalleled. Distortion at rated power is a conservative 0.5%.
$749.95. SPECIAL FREE OFFER!
Famous "Project 3/Popular Science 4-Ch. Test Record Albums for CD-4 & SQ. Both FREE with purchase of Model TS-500. Set up, calibrate & check out your quad system! Offer limited. Ask your dealer.
EXTRA-COURTESY OFFER! Onkyo makes it easy for you to check out your own 4-Ch. system for proper operation.
Order these unique test records today. $4.49ea. 2 for $8.00
Send check: Project 3 Test Records : 1133 Ave. of the Americas New York. N.Y. 10036
Onkyo Sales Section/Mitsubishi International Corp. 25-19 43rd Avenue, Long Island City, N.Y. 11101/(212) 729-2323
-----------------------------
Revox
FIVE OUT OF SIX TAPE RECORDER BUYERS WIND UP PAYING MORE THAN THEY NEED FOR PROFESSIONAL TAPE RECORDING QUALITY
Reason : They bought one or more makes before choosing Revox.
Our warranty records show that on average only one Revox buyer in six has never had a tape recorder before.
The remaining five have all owned one or more makes previously.
Revox G36 Price: Less than $450
Since our warranty application invites comment, we are frequently told how happy our customers are with their Revox, especially when they compare it with their previous purchases.
But too often we hear the lament :
"I wish I'd bought it sooner" Save yourself the cost of experimentation in tape recording.
Revox ATT Price: $899-$1379
Select a recorder that will neither add nor detract from the original.
Choose the New Revox A700 or the A77 as your needs befit--and if your finances don't quite run to a new machine try to find one secondhand--in standard condition it will outperform other makes of new equipment at the same price.
Revox A700 Price: $1695
-----------------------
The Heathkit AR-1500
The Heathkit AR-1500A The Heathkit AR-15 Milestones in Stereo Superiority
Audio connoisseurs demanding the best there is, found it in the AR-15 back in the late 60's. Then came the AR-1500 ... a quantum jump forward in this already superlative design. Now, in the AR-
1500A, Heath audio engineers have done it again, with design improvements that reconfirm this famed receiver's place in the field of audio excellence.
And while they were at it, they made the AR-1500A an even easier kit to build.
Design improvements include a Phase Lock Loop (PLL) multiplex demodulator with only one simple adjustment...your assurance of maximum separation, drift-free performance and long-term stability. The AM section also received attention, with a simplification of the AGC circuit resulting in significant improvements in AM performance.
Improved output protection has been added for better drive capability over today's wider range of speaker impedances.
In redesigning the AR-1500A, special care was given to making the kit even easier to build than before. A separate check-out meter is now provided, which the kit-builder assembles first, giving the novice confidence in his assembly skills.
The meter is then used to check out each step as assembly progresses. Factory-installed cable connectors are an other new kit-building aid.
The precedent-setting performance specifications of the AR-1500 have of course, been retained. Conservatively rated, the AR-1500A puts out 180 watts*, 90 per channel, into 8 ohms, with both channels driven, with less than 0.25% harmonic distortion. Two computer-designed five-pole LC filters and the 4-gang, front end combine for an FM selectivity better than 90 dB with 1.8 µV sensitivity. And here are some things the specs won't show you. There are outputs for two separate speaker systems, two sets of headphones, preamp output, and monitoring of FM with an oscilloscope such as the Heathkit Audio-Scope. Standard inputs--all with individual level controls. Electronically monitored amplifier overload circuitry. There are even two dual-gate MOSFETs, one J-FET and a 12-pole LC filter in the AM section for super sound there.
If you still need convincing, check the specifications below. Better yet, see and hear the new AR-1500A at your nearest Heathkit Electronic Center...or send for your free Heathkit catalog.
Kit AR-1500A, less cabinet, 53 lbs. 379.95 ARA-1500-1, walnut veneer cabinet, 8 lbs. 24.95 AR-1500A
SPECIFICATIONS-TUNER--FM SECTION (Monophonic):
Sensitivity: 1.8 g V.* Volume Sensitivity: Below measurable level. Selectivity: 90 dB.' Image Rejection: 100 dB.* IF Rejection: 100 dB.* Capture Ratio: 1.5 dB.* AM Suppression: 50 dB.* Harmonic Distortion: 0.5% or less.* Intermodulation Distortion: 0.1% or less.` FM SECTION (Stereophonic): Channel Separation: 40 dB or greater at mid-frequencies; 35 dB at 50 Hz; 25 dB at 10 kHz; 20 dB at 15 kHz.
19 kHz and 38 kHz
Suppression: 55 dB or greater. SCA Suppression:
55 dB. AM SECTION: Sensitivity: 50 aV with external input; 300 AV per meter with radiated input. Selectivity: 20 dB at 10 kHz; 60 dB at 20 kHz. Image Rejection: 70 dB at 600 kHz; 50 dB at 1400 kHz. IF Rejection: 70 dB at 1000 kHz. AMPLIFIER--Dynamic Power Output per Channel (Music Power Rating): 90 watts (8 ohm load)*; 120 watts (4 ohm load); 50 watts (16 ohm load). Continuous Power Output per Channel: 60 watts (8 ohm load)*; 100 watts (4 ohm load); 40 watts (16 ohm load). Power Bandwidth for Constant .25% Total Harmonic Distortion: Less than 8 Hz to greater than 30 kHz.' Frequency Response (1 watt level):-1 dB, 9 Hz to 80 kHz;-3 dB, less than 5 Hz to 120 kHz. Harmonic Distortion: Less than 0.25% from 20 Hz to 20 kHz at 60 watts output, less than 0.1% at 1000 Hz with 1 watt output.
Intermodulation Distortion: Less than 0.1% with 60 watts output, using 60 and 6,000 Hz mixed 4:1, less than 0.1% at 1 watt output.
Damping Factor: Greater than 60. Hum & Noise: Phono (10 millivolt reference),-63 dB. Tape and Aux (0.25 volt reference),-75 dB.
Volume control in minimum position,-90 dB referred to rated out put. Channel Separation: Phono, 55 dB; Tape and Aux, 55 dB or greaser. Output Impedance (each channel): 4 ohm through 16 ohms.
Dimensions: Overall – 18 1/2" W x 5 1/2" H x 13 7/8" D.
Rated IHF ( Institute of High Fidelity) Standards.
Send for your FREE Heathkit Catalog!
HEATHKIT ELECTRONIC CENTERS
Units of Schlumberger Products Corporation Retail prices slightly higher.
ARIZ.: Phoenix; CALIF.: Anaheim, El Cerrito, Los Angeles, Pomona, Redwood City, San Diego ( La Mesa), Woodland Hills; COLO.: Denver;
CONN.: Hartford ( Avon); FLA.: Miami ( Hialeah), Tampa; GA.: Atlanta; ILL.: Chicago, Downers Grove; IND.: Indianapolis; KANSAS: Kansas City ( Mission); KY.: Louisville; LA.: New Orleans ( Kenner); MD.: Baltimore, Rockville; MASS.: Boston (Wellesley); MICH.: Detroit; MINN.:
Minneapolis ( Hopkins); MO.: St. Louis; NEB.: Omaha; N.J.: Fair Lawn; N.Y.: Buffalo ( Amherst), New York City, Jericho, L.I., Rochester, White Plains; OHIO: Cincinnati (Woodlawn), Cleveland, Columbus; PA.: Philadelphia, Pittsburgh; R.I.: Providence ( Warwick); TEXAS: Dallas, Houston; WASH.: Seattle; WIS.: Milwaukee.
Prices & specifications subject to change without notice.
HEATH COMPANY, Dept. 40-6 Benton Harbor, Michigan 49022
Please send FREE Heathkit Catalog.
Enclosed is $ , plus shipping.
Please send model(s) Name Address City State zip
*Mail order prices; F.O.B. factory. HF-285
HEATH Schlumberger
-----------------------
Compare this one minute test of frequency response from "Theme from Shaft" on "Scotch" low noise tape ... with this frequency response on new "Scotch" Special Classic Series tape. White marker bar above indicates one-third octave between 12,500 and 16,000 Hz.
Wollensak sets a new performance record in 8-track frequency response Adding an 8-track unit to your stereo system is something you may not even be considering. Because you believe 8-track sound can't begin to compare with reel-to-reel or the finest cassette quality.
But now, the new Wollensak 8075 Dolby 8-track recorder deck is out to change your way of thinking.
Example: Compare the one minute test of frequency response on the B & K Analyzer above. On the left, we used "Scotch" low noise tape in the Wollensak 8075. On the right, new "Scotch" Brand Special Classic Series tape in the 8075 brings you higher frequency response in the 16,000 Hz range. A frequency response never before reached in 8-track sound that equals the finest cassette quality and approaches reel to-reel quality.
Here's how: The Wollensak 8075 features an exclusive Tape Selector Switch which optimizes the record equalization to take full advantage of "Scotch" Special Classic Series tape.
Together with Dolby, you get increased frequency response and greater dynamic range.
By setting the Tape Selector Switch in the "Regular" position, you can also use standard 8-track tape and still get superior frequency response.
This new Wollensak 8075 is the first 8-track recorder to bring you the Dolby Noise Reduction System.* And it even decodes FM Dolby radio broadcasts for noise-free listening.
Other features? A Digital Time Counter keeps track of the recording and playback time. Its automatic eject system protects recorded tapes from accidental erasure while recording.
Handsome styling, separate horizontal level controls, large dual illuminated VU meters, fast forward control, end-of-tape sensing, record cue, single play or repeat capabilities plus other features make this the finest 8-track you can add to your system.
Nobody knows more about sound-on-tape or has more experience in tape recording than 3M Company. Find out why at your nearest Wollensak dealer.
Or write: 3M, Dept. SR-64, St. Paul, MN 55101.
technical elegance from Wollensak.
3m COMPANY
--------------------------
It takes guts to offer a 5-year warranty.
Good guts.
Every Jensen high fidelity speaker comes with a 5-year warranty. It's the best in the business--an unconditional, 5-year warranty. And Jensen has the guts to give it to you.
Good guts, as in our Models 4, 6 and 3, that have woofers with heavy magnets and Flexair suspension for exceptionally clear sound. Or guts like our Sonodome ultra-tweeters which respond well beyond audible ranges.
Or, our mid-range elements with tuned isolation chambers to eliminate distortion. And special computer-designed crossover networks for optimum tonal blend.
It's everything you need for excellence in speaker systems. It's the good guts inside Jensen.
JENSEN SOUND LABORATORIES, Division of Pemcor. Inc. Schiller Park, Illinois 60176
--------------------
Quad.. Before you buy demand these answers.
If you've been reading the ads on quadraphonic, you're probably aware that most manufacturers claim 'total capability' for their receivers. How ever, total capability means different things to each manufacturer.
How, then, you may ask, can you be certain you're actually getting total quadraphonic capability.
Simple. Before you buy demand these answers.
1. Does this quad receiver have built-in circuitry to play CD-4 discrete records from Warner, Atlantic, Elektra and RCA?
2. Does this quad receiver play Columbia, Capitol, Epic and Vanguard SQ matrix four-channel records?
3. Does this quad receiver play the RM matrix records of A&M and Ode?
4. Does this quad receiver play two-channel stereo records, tapes and FM flawlessly, with boosted power from its quadraphonic limits? If the answer you receive isn't a resounding "yes" to all these questions--then you're not talking to a Pioneer dealer.
Pioneer is the only full line of quadraphonic receivers that reproduces every four-channel program source (CD-4, SQ, RM, discrete) and every record label--without adaptors, add-on decoders or demodulators.
QX-949--$749.95; QX-747-$649.95; QX-646--$499.95. Prices include walnut cabinets.
U.S. Pioneer Electronics Corp., 75 Oxford Drive, Moonachie, New Jersey 07074 West: 13300 S. Estrella, Los Angeles 90248 / Midwest: 1500 Greenleaf, Elk Grove Village, Ill. 60007 / Canada: S. H. Parker Co.
PIONEER when you want something better
---------------------------
And then there was music.
And then came Sony tape recorders to capture the words and music with perfect fidelity. Right from the start, Sony has always been first with the best, the newest and the broadest selection of tape recording equipment in the world. Sony tape recorders, Sony accessories, Sony microphones, Sony recording tape.
We could go on and on and on.
We are. SONY Ask anyone.
-------------------
==================
Also see:
TECHNICAL TALK--What Is Noise?
AUDIO QUESTIONS and ANSWERS--Advice on readers' technical problems LARRY KLEIN