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





Technics SE-A 808

 Technics Power Amplifier SE-A 808
 
Specifications
Amplifier Section
Continuous Powetr Output (both channels driven):
20 Hz - 20 kHz :
2 x 40 W at 4 Ω ;
2 x 40 W at 8 Ω;
90 W at 8 Ω, BTL
40 Hz - 16 kHz :
2 x40 W at 4 Ω;
2 x 40 W at 8 Ω;
90 W at 8 Ω, BTL
1 kHz :
2 x 50 W at 4 Ω;
2 x 45 W at 8 Ω;
100 W at 8 Ω, BTL
Total Harmonic Distortion:
Rated power at 20 Hz - 20 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Rated power at 40 Hz - 16 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Rated Power ay 1 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Half Power at 20 Hz - 20 kHz : 0,02% [4 Ω]; 0,01% [8 Ω]
Half Power at 1 kHz : 0,009% [4 Ω]; 0,006% [8 Ω]
-26 dB power at 1 kHz : 0,03% [4 Ω]
50 mW Power at 1 kHz : 0,05% [4 Ω]
Intermodulation Distortion:
Rated Power at 250 Hz : 8 kHz = 4;1, (4 Ω) :  0,03%
Rated Power at 60 Hz : 7 kHz = 4:1, (SMPTE, 8 Ω) :  0,02%
Power Bandwidth (both channels driven, -3  dB):  5 Hz - 45 kHz at 4 Ω, 8 Ω
Residual Hum and Noise:  0,5 mV
 Damping Factor:  16 at 4 Ω; 32 at 8 Ω
Input Sensitivity/Impedance:  500 mV/47 k Ω
Signal-to-Noise Ratio:  100 dB (108 dB, IHF-A)
Frequency Response:  20 Hz - 20 kHz, +0 dB, -0,2 dB [ 5 Hz - 60 kHz, -1 dB]
Channel Balance, (250 Hz - 6,300 Hz):  ±0,5 dB
Channel Separation (1 kHz):  60 dB
Headphones Output level/Impedance:  400 mV/330 Ω
Load Impedance:
Main or Remote :  4 Ω - 16 Ω
Main and Remote :  8 Ω - 16 Ω
BTL, Main or Remote :  8 Ω - 16 Ω
General
Power Supply:  110, 120, 220, 240 V AC, 50/60 Hz
Power Consumption:  460 W
Dimensions (W x H x D):  430 x 75 x 280 mm

Weight:  6,8 kg

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