IF 75 WATTS ISN'T ENOUGH, TRY 45.
Harman-Kardon
At first glance, you'd think a 75 watt receiver could outperform a 45 watt receiver easily. But FTC power ratings only tell you half the story-how a receiver will react under a continuous speaker impedance of 8 ohms.
Under realistic conditions, though, musical signals can actually cause speaker impedance to drop dramatically, demanding far more current than most 75 watt receivers can deliver. The receiver clips, robbing you of the true dynamics and excitement of your music.
That's why all Harman Kardon receivers have been designed with an enormous power reserve we call High Current Capability, or HCC.
The use of special output devices is part of the HCC design. Our output transistors and power supplies, for example, will produce as much power as your speakers demand. Right up to the point at which the receiver shuts down to protect your speakers.
How much power they'll deliver depends on which receiver you choose. The hk580i shown above is rated at 45 watts per channel. But it will deliver a full 200 watts or more of instantaneous power on demand, with absolutely no threat of clipping.
--- When you need power most--at low speaker impedances--conventional
receivers simply can't deliver. But Harman Kardon receivers with
HCC will deliver instantaneous power on demand until the receiver
shuts down to protect your speakers.
Of course power alone doesn't make a receiver great. There's distortion to conquer.
In most receivers, THD is reduced with a heavy application of negative feedback. But negative feedback causes a far more serious distortion called TIM or Transient Intermodulation Distortion. So we use less than 25 dB (compared to a more typical figure of 60-80 dB) to keep TIM inaudible to even the most critical ear.
But even a receiver that sounds great isn't perfect until it's got just the features you want. So we build six receivers to let you pick and choose. From our modest hk350i, with analog tuner and 20 watts per channel, to our top of the line hk680i with digital tuner, 60 watts per channel and every convenience feature an audiophile might want.
Accommodations for two sets of speakers and two tape decks. Tape monitor and two-way dubbing. High and subsonic filters. Tone defeat and loudness contour. And more.
So now that you know how committed we are to sonic accuracy, perhaps you should audition one of our High Current Receivers.
But only compare us to receivers with at least twice the power. After all, you do want to make :t a fair comparison.
For the Harman Kardon dealer nearest you, call toll-free L-800 528-6050, extension 870. Or write Harman Kardon, 240 Crossways Park West, Woodbury, N.Y. 11797.
In Canada, Gould Marketing, Montreal H4T 1E5.
Harman Kardon power ratings: RMS, both channels driven into 8 ohms, 20Hz-20 kHz with 0.05% THD.
harman-kardon --- ASK ANY AUDIOPHILE
Also see:
Link | NAD 7150 AM FM Receiver
Source: Stereo Review (USA magazine)