Our first low negative feedback components were designed for the audiophile.
- The hk725 High Technology preamplifier.
- The hk770 High Technology 65 watt per channel power amplifier.
- The hk710 High Technology phase locked analog tuner.
- The new hk750 High Technology 45 watt per channel integrated amplifier.
Last January, we introduced our 700 series High Technology Separates. The first moderately priced separates designed with low negative feedback.
Negative feedback? It's a form of electronic compensation used in virtually every preamplifier, amplifier and receiver. Used judiciously, negative feedback can improve frequency response and THD distortion characteristics. Unfortunately, most manufacturers try to reduce THD to lower and lower levels by adding more and more negative feedback-typically 60-80 dB. This excess negative feedback results in a new form of distortion called Transient Intermodulation Distortion (TIM), which does far more to degrade music than THD. In fact, according to a listening survey, TIM in music is detectable at levels just 1/10 the detectable levels of THD.
By keeping negative feedback to 30 dB or less in all Harman Kardon electronics, we've eliminated the harsh, metallic, grating effects of TIM produced by conventional equipment with high negative feedback. You'll hear startlingly clean, clear, open sound.
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Now everyone can afford to be an audiophile.
- The new hk350i High Technology 20 watt per channel receiver.
- The new hk460i High Technology 30 watt per channel receiver.
- The new hk570i High Technology 45 watt per channel receiver.
- The new hk680i High Technology 60 watt per channel receiver.
Now low negative feedback comes in an integrated amp and four receivers.
Not everyone could afford our original system of separates. Or needed the flexibility it offered. So we've expanded our High Technology Series to include a new 45 watt per channel integrated amplifier and four new receivers ranging from 20 to 60 watts per channel*.
In addition to low negative feedback, all feature our Ultra wideband designs for clearer, more precise stereo imaging. And our new receivers as well as our new integrated amp are all built with an extremely high instantaneous current capability. Which means they can deliver more than twice their power ratings when transients demand it.
For all the technological advances you get with our low negative feedback components, you might expect to give up convenience features. Or pay a premium price. But you don't.
So now you can have the best sound money can buy. No matter how much you have to spend.
harman/kardon --- 240 Crossways Park West, Woodbury, NY 11797
Toll free: 1-800-528-6050, ext. 870.
(adapted from Audio magazine, May 1981)
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Also see:
harman/kardon receivers (ad, Nov. 1978)
harman/kardon 730 receiver (Nov. 1976)