DC Stereo Integrated Amplifier (1978-79)
The development of the DC power amplifier can be counted as one of our most significant engineering successes, because it provides an almost perfect linear frequency response that starts virtually from 0Hz.
What this means is that the signal amplified has effectively the same waveform as that at the input terminals. The amplifier maintains extremely low distortion right down to the ultra-low frequency range. With excellent phase and transient characteristics - the response in actual conditions of musical reproduction - the sound that you hear is perfectly natural.
The direct-coupled amplifier consists of a three-stage differential circuit (with a dual-gate FET in the first stage) and our power amplifier circuitry, assuring ample, highly stable, effective power output.
To safeguard all circuits, and your precious speakers, there's a built-in limiter protection circuit and protection relays.
With phase and transient distortion both at negligible levels, the Kenwood KA-7100 provides a refreshing clarity and roundness of sound even at high volume levels.
Power output: 60 watts per channel into 8Ω (stereo)
Frequency response: 0Hz to 100kHz
Total harmonic distortion: 0.02%
Damping factor: 50
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 80dB (MM), 110dB (line)
Output: 150mV (line), 30mV (DIN)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 430 x 149 x 379mm
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Submitted by unitra
Submitted by Alex W
These units (KA-7100/KA-7300) are rock-solid performers and can be still be found in nice condition at very reasonable prices. Mine required nothing but a bit of dust removal (to cure that old electronics smell) and a bit of Deoxit on the contacts. The KA-7300 is currently powering a sub-sat system, and the KA-7100 is on a pair of Wharfdales that are part of my multi-room audio setup. These amps are a huge sonic improvement over the much newer (but still vintage) NAD receivers I had been using, and they weren't bad. Testing the units with KEF 103.2's they both performed very well indeed. The sound is warmer than the NAD's but every bit as detailed, and the imaging/staging is superior. As a bonus, the units easily serviced if need be.