Kenwood KA-6000 (1969)

Solid State Stereo Amplifier
180 watts of IHF standard total music power, enough to drive even low efficiency hi-fi speakers.
The wide power bandwidth of 10 Hz to 50,000 Hz with very low IM distortion.
Kenwood's exclusive low level phono inputs for low level output phono cartridges of 2 mV, 0,5 mV or 0,05 mV.
2 pairs of MAG input terminals for 2 set of record players.
Lever type -20 dB muting switch of quick response for momentary quietness during telephone call etc.
2 dB step type tone controls with tone mode switch.
Blue light indicators for input selector switch.
Lever type high and low filter switches.
Large volume/balance control knob located in center of frontpanel.
Pre-amplifier outputs for use with other power amplifier or multichannel system.
Main amplifier inputs for the use with other pre-amplifier, tuner and tape recorder with pre-amplifier, and also these unputs enable you to drive the main amplifier directly.
Speaker terminals for 2 sets of stereo speaker and front panel speaker selector switch.
Exclusive blow-out proof automatic circuit breaker protects power transistors.

SPECIFICATION
Power Output (continous power; at any frequency from 20 -20,000 Hz):
Each channel driven;

64/64 watts at 4 ohms load.
58/58 watts at 8 ohms load.
42/42 watts at 16 ohms load.
Both channels driven;

41/41 watts at 4 ohms load
455/45 watts at 8 ohms load.
34/34 watts at 16 ohms load.
Total Music Power (IHF):

180 watts at 4 ohm load.
170 watts at 8 ohms load.

Harmonic Distortion: Less than 0,5% at rated output from 20 to 20,000 Hz
Intermodulation Distortion (60 Hz & 7,000 Hz, 4:1):
Less than 0,3% at rated output or at any level of less than rated output;
Less than 0,1% at -3 dB rated output
Frequency Response:
Main Amp. only; 10 Hz to 50,000 Hz ±1 dB
High Level Input; 20 Hz to 50,000 Hz ±1 dB
Sensitivity (from rated output at 8 ohms load):
Phono 1; 2 mV, 0,5 mV, 0,05 mV (switchable)
Phono 2: 2 mV
Tape Head: 2,3 mV
MIC: 2 mV
AUX: 200 mV
Tuner: 200 mV
Tape Play: 200 mV
Main Amp Input: 100 mV
Input Impedance (at 1,000 Hz):
Phono 1 (2 mV); 50 Kohms
Phono 1 (0,5 or 0,05 mV): 200 ohms
Phono 2; 50 Kohms
Tape Head: 100 Kohms
MIC: 100 Kohms
AUX,Tuner,Tape Play: 77 dB
Noise at minimum volume control: 1mV at 8 ohms or 0,0125 milliwatts.

Output Impedance (at speaker terminal):
0,275 ohm at 1,000 Hz
0,39 ohm at 50 Hz
0,275 ohm at 10,000 Hz
Damping Factor (at 1,000 Hz):
58 at 16 ohms load
29 at 8 ohms load
Low Filter (for rumble):
40 Hz Cutoff, 12 dB per octave
80 Hz Cutoff, 12 dB per Octave
High Filter (for scratch ): 8,000 Hz Cutoff, 12 dB per octave
Bass control: ±10 dB at 1000 Hz with 2 dB step switch
Treble Control; ±10 at 10,000 Hz with 2 dB stepswitch
Power Consumption:
AC 110-120/220-230 volts, 50/60 Hz
18 watts quiescent. 190 watts at full power
Dimensions: 16⁵/₁₆" x 5 ⁵/₃₂" x 11 ¹/₃₂" (W x H x D)
Weight: 24,5 lbs