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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





Teac AS-200

 The Teac Model AS-200 Integrated Amplifier combines a 100 watt (at 4 ohms) total power output with centralized stereo system control. A differential-type integrated amplifier with high-cut and low-cut filters provides a wide dynamic range with natural-sound reproduction. Switched power outlets, complete facilities for stereo system interconnection, and hidden panel controls permit elaborate system setup with centralized control from this stylish amplifier.
 Features:
Differential-type integrated amplifier:  providing a wide dynamic range, stability, and high-quality performance.
Transistorized amplifier:  with high sensitivity FET input circuit and three-stage direct coupled amplifiers.
Bass and treble controls:  for tone compensation with tone cancel switch.
Preamp center-channel output:  for three-dimensional stereo effects.
Switched and unswitched AC outlets:  for central stereo system power source control.
Large variety of input connectors:  on rear panel for versatile application with RIAA equalization for phono inputs.
Overload protection:  by push-to-reset circuit breakers.
Attractive front panel:  with only essential controls showing; infrequently used controls are hidden behind lower front panel.
Specifications:
Continuous Power Output:  50 W / 50 W at 4 Ω
Power Bandwidth: 30 to 30,000 Hz
Frequency Response:  20 to 80,000 Hz
High Frequency Distortion:  less than 0,5%
IM Distortion:  less than 0,5%
Signal-to-Noise Ratio: 
Phono : less than 65 dB
High Level :  less than 75 dB
Controls:
Low Tone  : ±10 dB variation at 100 Hz
High Tone : ±10 dB variation at 10,000 Hz
Output :
Pre-amplifier :  1 volt
Tape Recording : 0,2 volt
Center Channel :  1,4 volt
Input:  Tuner; Aux 1 and 2; Phono 1 and 2; Tape Deck 1 and 2
Hidden Panel Controls:
Switches:  Phono,High-cut filter, Low-cut filter; tone and loudness
Selector Switches:  Mode (Reverse, Stereo, Lift, Right and L+R), Speaker (off, Main, remote, and M+R)

Controls:  Bass and Treble, Headphone jack
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