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

The Fisher 400-C

 Model 400-C Stereo Master Audio Control
Has 16 input jacks and 9 controls for any combination of stereo or monaural uses. Provides for stereo tapes, disc, AM-FM, FM-FM, FM Multiplex and mikes; monaural tapes, disc, Am, Fm, TV sound, Short-wave and mike; recording stereo or monaural with monitoring facilities; and, electronic crossover at 650 cps handling monaural program sources into stereo systems for stereo effects. Four outputs in two pairs for stereo or monaural use.
Twelve stage audio circuit with shielded transformer for hum-free performance.  Four AC outputs for driving other equipment. 
Input; Equalization; Output Selector; 3-position Rumble Filter; 3-position Loudness Contour; Volume and On-Off; Channel Volume Balance; Separate Bass and Treble and 4 input Level Adjustments.
Type Set:  AC Operated Stereo Amlifier
Frequency Response:  20 Hz - 25,000 Hz (Uniform)
Distortion:  less than 0,15% (for 2 volts output);  0,3%  (for  5 volts)
Hum and Noise:  Better than 85 dB for high level inputs and 2 volts output;  65 dB for 10 mV low level input and 2 volts output
Tube Complement:  4 x ECC83;  2 x 12 AT7;  1 x EZ80
Power Supply:  110 -125 Volts AC, 60 cycles
Power Rating:  32 Watts, .30 Amp At 117 Volts Ac
Dimensions (W x D x H):  15-1/8 x 9 x 4-13/14 inches

Weight:  10 lbs

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