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 A-170 cassette deck

The A-170 is the basic cassette machine. But it's basic only when compared to more advanced Teac models. Our entire line is extremely sophisticated, offering quality and features not generally found on less expensive equipment. Every Teac deck must pass a rigid quality control check before leaving the factory, and reliability is almost synonymous with the Teac name. Additional features make some of our products more expensive. But none are more rugged or reliable than the A-170.

The Teac tape transport
The A-170 features a new transport system utilizing many of the ultra-precise parts and design innovations found in our more costly decks. Included among these are the special Teac capstan driveshaft, ground to a tolerance of 1 micron or less. And an all new DC Servo Controlled Motor, with amazing sspeed accuracy. These transport features provide smooth precise tape motion, and wow and flutter is kept to an insignificant 0,09%

High density ferrite heads.
The A-170 features High Density Ferrite heads which are extremely hard and offer a greatly extended life. Teac heads are specially designed to permit distortion-free recording up through the highest audio frequencies.

Expanded range level meters
The key to good recordings is the proper setting of the input levels. The  large, bright meters on thhe A-170 make this easy. The meters are merked to +3 VU but needle range extends to +6 VU to facilitate adjustment for very strong signals and to allow higher than normal recording levels.

Built-in Dolby NR.
The A-170 includes the same Dolby Noise Reduction circuitry found in our top-of-the-line A-450. it reduces tape  hiss and can improve your Signal-to-Noise by as much as 10 dB over 5 kHz. You'll probably use it all the time.

Other important features
Two position switches let you adjust Bias and EQ for either Ferric Oxide or Chromium Dioxide tapes, for maximum performance from both.
The Mic/Line switch allows you to select between "Live" recording from microphones or recording from other audio sources, and cuts in a built-in pre-ampifier  when microphones are used.
Built into the A-170's transport system is an advanced Auto-Stop mechanism. Whenever the end of the tape is reached, the transport automatically returns to the Stop mode.

Track System:  4-track, 2-Channel Stereo
Motor:  DC-Servo Controlled Motor
Heads: two. Erase and Record/Playback heads
Tape Type:  Compact Cassette C-60 and C-90
Wow and Flutter:  0,09% (NAB weighted)
Frequency Response (overall):  30 - 16,000 Hz (CrO₂ tape); 30 -13,000 Hz
Signal-to-Noise Ratio (overall):  50 dB (can be improved with Dolby NR up to 5 dB at 1 kHz and 10 dB over 5 kHz)
Rewind/Fast Forward Time:  100 seconds for C-60
Inputs Sensitivity /Impedance:
Line :  2 x 60 mV/50 k Ω
Microphone :  0,25 mV (-72 dB)/600 Ω or more
Line :  2 x 0,775 V/ 50 k Ω
Headphone :  Jack, 8 Ω
Power Requirement:  100/117/220/240 V AC, 50/60 Hz
Power Consumption: 8 W
Dimensions (W x H x D):  430 x 136 x 225 mm (16-15/16" x 5-3/8" x 8-7/8")
Weight:  4,5 kg (10 lbs) net

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