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 GXC-310D cassette deck

The GXC-310D takes great pride in its performance. For example, it has a closed loop double capstan drive system - a feature usually found only in very expensive cassette models. With this system, the recording/playback heads is positioned in the centre between two capstans and pinch rollers. This not only gives better head-to-tape contact but also maintains constant tape tension.

An integral part of this system is an anti-vibration hysteresis synchronous motor. The net result of this combination is outstanding tape travel stability, constant tape tension and speed, and an excellent wow/flutter specification of 0,07% RMS.

Like all Akai cassette machines, the GXC-310D features the Dolby NR system to reduce tape hiss to a virtually inaudible level, give a bigger frequency response and a better Signal-to-Noise Ratio. But it also features Akai's ADR (Automatic Distortion Reduction) system which varies the equalisation at high input levels to cut distortion and extend the dynamic range at high frequencies.

Its amny other features include a Peak Level indicator, Automatic Stop, Limiter switch, Mic/Line Input Selector for a wider dynamic margin and less noise, Pause Control, Output Level Control for perfect matching with any amplifier input, Tape Run indicator, Memory Rewind and Index Counter, direct function change controls and a bias and equalisation switch for low noise, CrO₂ or ferrichrome tape. Again, there's a specially designed perspex dust cover as an optional extra.

 


Specifications

Track System:  4-trak, 2-channel stereo

Tape Speed:  4,8 cm/s (1-7/8 ips

Wow and Flutter:  less than 0,07% WRMS

Frequency Response: 

Low Noise Tape :  30 to 14,000 Hz (±3 dB)

CrO₂ Tape :  30 to 16,000 Hz (±3 dB)

Fe-Cr Tape :  30 - 17,000 Hz (±3 dB)

Distortion:  less than 1,5 % (1,000 Hz 0 VU)

Signal-to-Noise Ratio:  better than 50 dB (with Dolby; up to 60 dB , above 5 kHz)

Bias Frequency:  100 kHz

Erase Ratio:  better than 70 dB

Heads:  GX recording/playback head and erase head

Motor:  4-pole hysteresis synchronous outer-rotor motor

Fast Forward and Rewind Time:  75 sec C-60 cassette tape

Output Jack: 

Line :  0,775 V (0 VU) required load impedance; more than 10 k

Phone :  30 mV/8

Input Jack:

Microphone :  0,3 mV/5 k

Line :  60 mV/100 k

DIN Jack : 

Output :  0,4 V

Input :  2 mV

Dimensions (W x H x D):  440 x 142 x 300 mm (17,3" x 5,6" x 11,8")

Weight:  8,6 kg (18,9 lbs)


 

Nessun commento:

Posta un commento