Kenwood KA-4004 (1973)

Creative craftsmanship-long a much-heralded aspect responsible for a great deal of Kenwood's success-is your built-in guarantee of total reliabilty. Selection of parts and materials is a significant beginning for this over-all stereo harmony, as demonstrated in the KA-4004 18/18 watt stereo amplifier. kenwood's scientific "Trouble Shooters" are in the process of elevating instrument quality by raising the standards of all models before they are offered for sale. Quality cutback is greatly minimized in the KA-4004 by using PNP Can type sealed transistors and nichrome-covered resistors in the preamplifier. Also, the print boards are directly combined with the tone control switches. needless wire connections are thus eliminated and over-all sophisticated circuitry-another kenwood hallmark of distinction-greatly improved. In many respects the KA-4004 is similar to the KA-6004 for its total, part-by-part auto-reliability.

Specifications

Continuous Power Output:

both channel driven:

18 + 18 watts into 8 Ω at any frequency from 20 - 20,000 Hz

19 + 19 watts into 8 Ω at 1,000 Hz

26 + 26 watts into 4 Ω at 1,000 Hz

each channel driven:

25 + 25 watts into 8 Ω at 1,000 Hz

36 + 36 watts into 4 Ω at 1,000 Hz

Dynamic Power Output (IHF):

58 watts per channel into 8 Ω at 1,000 Hz

95 watts per channel into 4 Ω at 1,000 Hz

Total Harmonic Distortion:

less than 0,5% at rated output from 20 -20,000 Hz;

less than 0,05% at -3 dB rated output

Intermodulation Distortion (60 Hz; 7,000 Hz; 4:1):

less than 0.5% at rated output;

less than 0,08% at -3 dB rated output

Power Bandwidth (IHF): 10 Hz to 50,000 Hz

Input Sensitivity/Impedance (for rated output, at 1,000 Hz):

Phono 1: 2,5 mV, 50 kΩ

Phono 2: 2,5 mV, 50 kΩ

Tuner: 160 mV, 30 kΩ

Aux 1, 2: 160 mV, 30 kΩ

Tape Play A & B: 160 mV, 30 kΩ

Main Amp. Input: 1 V, 50 kΩ

Recording Output (below rated input):

Tape Rec A & B: 160 mV

DIN connector: 40 mV

Signal to Noise Ratio (below rated output):

Phono 1 & 2: 65 dB

Tuner: 75 dB

Aux 1 & 2: 75 dB

Tape Play A & B: 75 dB

Noise at Minimum Volume Control: 0,3 mV at 8 Ω, 0,000012 milli watts

Damping Factor: 32 at 8 Ω load; 64 at 16 Ω load

Speaker Impedance: accepts 4 to 16 Ω

Bass Control: ±10 dB at 100 Hz

Treble Control: ±10 dB at 10,000 Hz

Low Filter: 80 Hz cut off, 6 dB per octave

High Filter: 7,000 Hz cut off, 6 dB per octave

Loudness Control (-30 dB): +8 dB at 100 Hz; +3 dB at 10,000 Hz

AC Outlets: 1 switched & 3 unswitched

Power Requirement: 110 - 120 V/220 - 240 V AC, 50/60 Hz

Power Consumption: 105 watts at full power; 15 watts at no signal

Dimensions (W x H x D): 435 x 153 x 300 mm (17-1/8 x 6-1/32 x 11-13/16 inch)

Weight: 9,3 kg (20,5 lbs)