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

Pioneer SA-800

 The Pioneer SA-800 is a professional stereo amplifier that, in performance and specifications, ranks with the very finest of high power units now being manufactured taday. It has a multitude of features that make it suitable for most anyone's home stereo system, but especially one that requires multiple-purpose versatility.
The SA-800 employs all-stage direct coupling circuitry in the power amplifier section, a vast improvement over conventional circuitry using coupling capacitors, and the result is an astonishingly wide power bandwidth of 5 - 50,000 Hz (at 8 ohms).
The unit also has a high-grade protector circuit using relays and transistor which safeguards the speakers and output transistors under all conditions.
There are two sets of tape terminals for easy tape-to-tape duplicating; there are also dual phono terminals which can accommodate both moving magnet and moving coil cartridge turntables. There are other extras, too, which make the SA-800 a truly professional instrument as well as tremendous investment in the kind of quality that Pioneer continues to make famous.
Power Amplifier Section
Music Power Output (IHF):  165 watts at 4 ohms; 108 watts at 8 ohms
Continuous Power Output (each channel driven): 
53 watts / 53 watts at 4 ohms
41 watts / 41 watts at 8 ohms
Continuous Power Output (both channel driven):
39 watts + 39 watts at 4 ohms
34 watts + 34 watts at 8 ohms
Power Output in the range of 20 to 20,000 Hz (both channel driven):
26 watts + 26 watts (8 ohms, harmonic distortion less than 0,5%)
Total Harmonic Distortion:  less than 0,5%
Intermodulation Distortion:  less than 0,5%
Power Bandwidth (IHF):  5 to 50,000 Hz (8 Ω, THD less than 0,5%)
Frequency Response:  5 to 80,000 Hz ±1 dB
Input Sensitivity/Impedance:  560 mV/100 k Ω (1 kHz continuous power output)
Speakers:  4 to 16 Ω
Damping Factor:  65 (8 Ω, 1 kHz)
Center Channel Output :  500 mV
Preamplifier Section
Output Voltage:  3 V (rated output); 5 V (max.)
Harmonic Distortion:  less than 0,1%
Frequency Response:  20 to 60,000 Hz ±1 dB
Input Sensitivity/Impendance:
Phono 1 (Mag) :  3 mV/50 k Ω
Phono 1 (Cer) :  56 mV/100 k Ω
Phono 2 (MM):  3 mV/50 k Ω
Phono 2 (MC):  110 µV/30 Ω
(with phono input transformer model PP-402)
Mic :  2,3 mV/25 k Ω
Tuner :  230 mV/200 k Ω
Aux 1, 2 :  230 mV/200 k Ω
Tape Monitor 1, 2 :  230 mV/200 k Ω
Recording Output:
Tape Rec 1, 2 (Pin Jack) :  230 mv
Tape rec (DIN) :  35 mV
Tone Control:
Bass :  -9 dB, +12 dB at 100 Hz (3 dB step)
Treble :  -12 dB, +9 dB at 10 kHz (3 dB step)
Low Filter :  -3,5 dB/ 60 Hz (12 dB/oct)
High Filter :  -3 dB/6 kHz (12 dB/oct)
Equalization Curve:  Phono - RIAA standard
Loudness Contour:  +11,5 dB/100 Hz ; +6 dB/10 kHz, with volume control set at -40 dB position
Muting:  -20 dB
Hum and Noise(IHF): 
Phono :  more than 80 dB
Tuner, Aux :  more than 100 dB
Channel Separation (1 kHz):
Phono :  more than 50 dB
Tuner, Aux :  more than 55 dB
Power Requirement:  110, 120, 130, 220, 240 V (switchable)  50/60 kHz
Power Consumption:  230 watts (max.)
Dimensions (W x H x D):  430 x 145 x 337 mm (16-15/16" x 5-11/16" x 13-1/4")
Weight:  10,3 kg (23 lb) net

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