Kenwood KA-4000

 Kenwood 120 Watt Solid State Amplifier Model KA-4000

Features

120 watts of IHF standard total music power enough to drive even low efficiency Hi-Fi speaker

The wide power bandwidth of 13 Hz to 30,000 Hz with very low IM distortion

Lever type -20 dB muting switch of quick response for momentary quietness during telephone call, etc.

2 dv step type tone controls

Blue light indicators for input selector switch

Lever type high and low filter switches

Pre-amplifier outputs for use with other power amplifier or multichannel system.

Main amplifier inputs for the use with pther pre-amplifier, tuner and tape recorder with pre-amplifier, and also these inputs enable you to drive the main amplifier directly

Speakers terminals for 2 sets of stereo speakers and front panel speaker selector switch (A, B, A & B and Phones)

Large Volume/Balance controls knob located in center of front panel.

Exclusive blow-out proof automatic circuit breaker protects power transistors

SPECIFICATION

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

Total Music Power (IHF):  120 watts at 4 Ω;  100 watts at 8 Ω load

Continuous Power:

Each channel driven:  53/53 watts at 4 ohms load;  40/40 watts at 8 ohms load.

Both channels driven;  41/41 watts at  4 ohms load;  32/32 watts at 8 ohms load.

Power bandwidth (IHF):  13 Hz to 30,000 Hz

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;  18 Hz to 50,000 Hz ±1 dB

High Level Input;  20 Hz to 50,000 Hz ±1 dB

Sensitivity (fro rated output at 8 ohms load):

Phono 1;  2 mV

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 :  50 Kohms

Phono 2 :  50 Kohms

Tape Head :  100 Kohms

MIC :  100 Kohms

AUX,Tuner,Tape Play :  100 dB

Main Amp. Input :  300 kohms

Signal-to-Noise Ratio (below rated output):

Phono 1 :  65 dB

Phono 2 :  65 dB

Tape Head :  63 dB

MIC :  67 dB

AUX, Tuner, Tape Play :  77 db

Noise at minimum volume control: 1mV at 8 ohms or 0,0125 milliwatts.

Output Impedance (at speaker terminal):

0,29 ohm at 1,000 Hz

0,52 ohm at 50 Hz

0,29 ohm at 10,000 Hz

Damping Factor (at 1,000 Hz):

55 at 16 ohms load

27,5 at 8 ohms load

Low Filter (for rumble):  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 Requirement/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: 17,6 lbs