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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Kenwood KA-5002

 Kenwood KA-5002 (1971) is Direct coupling Stereo amplifier  and offering less power than some other stereo amplifiers, the 150 watt (IHF) KA-5002 also manages to achieve a true audio eminence in the presentation of pure sound. Superb frequency response and ultra-wide bandwidth with lowest-possible IM distortion are achieved through the KA-5002's all stages direct coupling circuitry and pure complementary-symmetry driver stage. All the other thousand-an-one Kenwood quality extras are included to make this an ideal stereo system.
 Special features
All satges direct coupling circuitry and pure complementary symmetry driver stage ensure superb frequency response, ultra-wide power bandwidth, large damping factor, lowest IM distortion, etc.
Improved NF type equalizer circuit provides wide dynamic range.
2 dB step type accurate tone controls for bass and treble.
Impedance selector for phono input (30 or 50 kohms)
Exclusive null balancer brings perfect left/right channel balance.
Tape monitor and dubbing switch for 2 tape decks.
4 channel input, output terminals and mode switch on the front panel.
Exclusive low level phono input (0,06 mV)
Two pairs speaker terminals and selector switch on the front panel.
Pre-amplifier output and main-amplifier input jacks.

Specifications
Total Power Output (both channel):
180 watts ±1 dB at 4 ohms
140 watts ± dB at 8 ohms
Total Dynamic Power (both channel, IHF):
150 watts at 4 ohms
120 watts at 8 ohms
Continuous Power Output (each channel driven):
60/60 watts at 4 ohms
50/50 watts at 8 ohms
Continuous Power Output (both channel driven):
48/48 watts at 4 ohms
30/30 watts at 8 ohms
Harmonic Distortion:  less than 0,5% at rated output from 20 Hz to 20,000 Hz
Intermodulation Distortion (60 Hz & 7,000 Hz ; 4 : 1):
At rated output : Less than 0,3%
At -3 dB rated output : less than 0,1%
Frequency Response:  20 Hz to 50,000 Hz ±1 dB
Sensitivity (for tared output at 8 ohms load):
Phono 1 : 2,5 mV
Phono 2 : 0,06 mV  or  2,5 mV
Mic : 2,5 mV
Tuner, Aux 1, 2 :  200 mV
Tape A, B : 200 mV
Main amp input : 1 V
Input Impedance (at 1 kHz):
Phono 1 : 30 or 50 kohms
Phono 2 : 200 ohms (0,06 mV);  50 kohms (2,5 mV)
Mic : 50 kohms
Aux 1, 2 : 100 kohms
Tape A, B : 100 kohms
Main amp input : 50kohms
Signal-to-Noise Ratio (below rated output):
Phono 1 : 65 dB
Phono 2 : 45 dB (0,06 mV);  65 dB (2,5 mV)
Mic : 67 dB
Aux,  Tuner, Tape  : 77 dB
Noise at minimum volume control 0,5 mV at 8 ohms or 0,0003 milliwatts
Low Filter (for rumble):  80 Hz cutt-off, 12 dB per octave
High Filter (for scratch):  7,000 Hz cut-off, 12 dB per octave
Bass Control:  ±10 dB at 100 Hz with 2 dB step switch
Treble Control:  ±10 dB at 10,000 Hz with 2 dB step switch
Input:
Pair of Phono 1, Phono 2; Mic, Aux 1-2; Tape Play A, B; 4 channel and main amp.inputs
Output:  2 pairs of stereo speaker outputs (4 to 16 ohms); pre-amp. Outputs; Tape recording outputs A and B, DIN standard tape Rec/Play connector A and B; switched and unswitched AC outlets and 4 channel output
Power Requirement:  AC  110 - 120 V, 220 - 240 V, 50/60 Hz
Power Consumption:  15 watts at no signals , 200 watts at full power
AC Outlets:  3 switched, 1 unswitched
Dimensions (W x H x D):  408 x 134 x 280 mm (16-15/16'' x 5-5/32'' x 11-1/16'')
Weight:  9,1 kg  (20 lbs)


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