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-4002

 Solid State Stereo Amplifier Kenwood model KA-4002
Is the solid state stereo amplifier that packs a compact-sized wallop. With 95 watts and intensely low-low distortion, this instrument guarantees top-level performance of the highest proportions. Another remarkable example of kenwood complete, high-quality circuitry, the KA-4002 also stresses modern, up-to-date design with its simple stylized exterior. Its unbeatable craftmanship makes this model another testimony to Kenwood deserved world fame.
 Special Features
Compact-sized outside
Kenwood has thoroughly researched what is really needed for a stereo amplifier and what is not. The KA-4002, one of the smallest high-quality amplifier in the world is a product that only Kenwood can achieve. It is quite care-free for setting.

Condensed Inside
You could not imagine the inside of KA-4002 from its size. The all silicon-transistorized circuitry provides abundant 80 watts IHF power (at 4 ohms) with less than 0,5% intermodulation distortion and wide 18 - 30,000 Hz power bandwidth.

Speaker Selector
Two sets of speaker system can be connected and selected by the switch on the front panel. They can also be driven together.

Precise Tone Control
For each bass and treble control the click type switches are used. They bring accurate increase/decrease by 10 dB at 100 Hz and 10,000 Hz. You can arrange most preferable performance according to the listening condition.

Two Input Jacks for Phono
You can use 2 sets of stereo player. In addition, you can combine the second tuner or stereo cassette deck because KA-4002 has 2 input jacks for Aux.

Tape Dubbing jack
The tape dubbing jack on the front panel makes it possible to connect the second tape deck and to dub from another deck.

Other Features
Stereo headphones jack, High, Low filter and Loudness, Mono output jack.
Specifications
Total Power Output (both channel):
95 watts ±1 dB at 4 ohms
67 watts ± dB at 8 ohms
Continuous Power Output (each channel driven):
33/33 watts at 4 ohms
24/24 watts at 8 ohms
Continuous Power Output (both channel driven):
21/21 watts at 4 ohms
18/18 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 0,5%
At -3 dB rated output : less than 0,2%
Frequency Response: 
Main Input :  15 Hz - 50,000 Hz ±1,5 db
High level Input (Aux) :  20 Hz to 40,000 Hz ±1,5 dB
Power bandwidth (IHF):  18 - 30,000 hz
Input Sensitivity (for tared output at 8 ohms load):
Phono 1 : 2,5 mV
Phono 2 : 2,5 mV
Tuner, Aux 1, 2 :  150 mV
Tape  play : 150 mV
Main amp Input : 100 mV
Input Impedance (at 1 kHz):
Phono 1 : 50 kohms
Phono 2 : 50 kohms (2,5 mV)
Aux 1, 2 : 100 kohms
Tape, Tuner  : 100 kohms
Recording Output (Below Rated Input): 
Pin : 150 mv
DIN : 30 mv
Hum and Noise (Below Rated Output):
Phono 1, 2 :  60 dB
Tuner, Tape Play :  70 dB
Aux 1, 2 :  70 dB
Damping Factor (at 8 ohms):  50
Speaker Impedance:  accept 4 to 16 ohms
Low Filter:  -10 dB (50 Hz)
High Filter:  -8 dB (10,000 Hz)
Loudness Control (at -30 dB):
+8 dB at 100 Hz
+4 dB at 10,000 Hz
Bass Control:  ±10 dB at 100 Hz
Treble Control:  ±10 dB at 10,000 Hz
Semiconductors:  18 Transistors; 10 Diodes
Power Requirement:  AC  110 - 120 V, 220 - 240 V, 50/60 Hz
Power Consumption:  8 watts at no signals , 115 watts at full power
AC Outlets:  1 switched, 1 unswitched
Dimensions (W x H x D):   (13'' x 4-5/8'' x 9-7/16'')

Weight:  5,7 kg  (12,5 lbs)

1 commento:

  1. I have one:
    https://goo.gl/photos/jT9R7DEv3MSLa6iJ9
    The audio quality is amazing!

    RispondiElimina