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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





Technics SU-7100 amplifier


Specifications:
Amplifier Section
Continuous Power (both Channels Driven)
At 1 kHz :  2 x 40 W (at 4 Ω ); 2 x 37 W (at 8 Ω )
From 40 Hz to 16 kHz :  2 x 38 W (at 4 Ω ):  2 x 36 W (at 8 Ω )
From 20 Hz to 20 kHz :  2 x 36 W (at 4 Ω ):  2 x 35 W (at 8 Ω )
Power Bandwidth (both Channel Driven at 4 Ω ):  5 Hz - 30 kHz  -3 dB
Residual Hum and Noise:  0,6 mv
Total Harmonic Distortion:
Rated Power at 1 kHz :  0,1% (4 Ω , 8 Ω )
Rated Power at 20 Hz -20 kHz :  0,1% (4 Ω , 8 Ω )
Rated Power at 40 Hz - 16 kHz :  0,1% (4 Ω , 8 Ω )
Half Rated Power at 20 Hz - 20 kHz :  0,06% (4 Ω , 8 Ω )
Half Rated Power at 1 kHz :  0,03% (4 Ω , 8 Ω )
-26 dB Rated Power at 1 kHz :  0,1% (4 Ω )
50 mW Power at 1 kHz :  0,2% (4 Ω )
Intermodulation Distortion:
Rated Power (at 250 Hz : 8000 Hz =4:1) ; 0,16% (4 Ω )
Rated Power (at 60 Hz : 7 kHz = 4:1) :  0,1% (8 Ω )
Damping Factor:  20 at 4 Ω ; 40 at 8 Ω
Input Sensitivity/Impedance
Phono :  2,5 mV/47 k Ω
Tuner, Tape 2 Playback:  150 mV/33 k Ω
Tape 1 Playback, Rec/Play Input :  180 mV/36 k Ω
Phono Max. Input Voltage (1 kHz, RMS):  110 mV
Signal-to-Noise Ratio
Rated Power, (4 Ω )
Phono :  83 dB (IHF, A ; 78 dB)
Tuner Tape :  83 dB (IHF, A;  97 dB)
-26 dB Rated Power (4 Ω )
Phono :  55 dB
Tuner, Tape :  58 dB
50 mW Power Output (4 Ω )
Phono :  53 dB
Tuner, Tape :  53 dB
Frequency Response:
Phono (30 Hz - 15 kHz) RIAA Standard Curve ±0,5 dB
Tuner, Tape
10 Hz - 80 kHz, -3 dB
15 Hz - 40 kHz, -1 dB
20 Hz - 20 kHz, ±0,5 dB
Tone Controls
Bass :  50 Hz ±12 dB
Treble :  20 kHz ±12 dB
Loudness Control (Vol. At -30 dB):  100 Hz =8 dB
High Filter :  8 kHz, -6 dB/oct
Output Voltage:
Tape 1, 2 Rec Out :  150 mV
Tape 1 rec/Play Output :  30 mV/82 k Ω
Channel Balance (250 Hz - 6300 Hz):  ±1,5 dB
Channel Separation at 1 kHz :  60 dB
Headphones Level and Output Impedance:  400 mV/330 Ω
Load Impedance Main or Remote:  4 - 16 Ω 
Genaral:
Power Supply:  220 V/240 V 50/60 Hz
Power Consumption:  340 W
Dimensions (W x H x D):  410 x 139 x 329 mm
Weight:  6,6 kg

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