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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





Akai 4000D tape deck

Three Head Stereo Tape Deck

A superb stereo tape deck enabling stereo fans to produce the ultimate in high fidelity recordings

High quality three head system embodying the latest techniques, featuring an exclusive one micron gap recording and playback heads plus erase head

All silicon transistorized pre-amplifier reduces hissing noise to a minimum

Strudy mechanism providing excelent durability

Fine oil-finished wooden cabinet matching furniture and / or stereo set

 

Outstanding Features

4-track stereo/monaural recording and playback. For playback, the 4000 D requires an external power amplifier and speakers

2 speeds - 3-3/4 and 7-1/2 ips

3 heads - One micron gap recording and playback heads plus erase head

All silicon trasistorized pre-amplifier

Shield type head for high Signal-to-Noise Ratio

Two lever system ensures dependable and durable sure operation

Track selector for simple selection between stereo and monaural

Sound on sound (by using an optional cord). Sound with sound

Automatic shut off, instant stop control

Tape cleaner

Tape speed equalizer

Tape lifter in fast forward and rewind operation

DIN Jack

Stereo headphone jack

3-digit index counter with reset button, 2 VU meters

Fine oil-finished wooden cabinet

Vertical and horizontal operation

Universal voltage selector (from 100 V to 240 V, 50/60 Hz)

 

Specifications

Recording System:  4 -track stereo- monaural system

Motor:  Induction motor

Semiconductors;  17 silicon transitors, 2 Diodes; 2 rectifiers

At 7-1/2 ips :  Frequency Response:  30 to 22,00 cps ±3 dB

At 3-3/4 ips :  30 to 16,000 cps ±3 dB

Distortion: within 2% 1,000 cps  0VU

Wow and Flutter:

At 7-1/2 ips :  less than 0,15% RMS

At 3-3/4 ips :  less than 0,20% RMS

Signal-to-Noise Ratio: better than 50 dB

Input Level:

Microphone:  better than 0,5 mV

Line :  better than 50 mV

Output Level:  0 VU (1,23 V RMS)

Equalization:  Correct equalization for playback of tapes recorded to the NARTS curve

Recording Level Indicator:  2 VU meters

Fast Forward and Rweind Time:  150 sec. Using 1,200 foot tape at 50 cycles. 120 sec. At 60 cycles

Max Recoding Time:

4 hours monaural recording at 3 -2/4 ips (1,200 foot recording tape)

2 hours stereo recording at 3-3/4 ips

Dimensions (W x H x D):  315 x 405 x 180 mm (12-3/8" x 15-7/8" x 7-1/2")

Weight:  11,5 kg (25,3 lbs)


 

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