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 GX-230D reel-to-reel

AC Servo Capstan Motor and GX head characteristics assure  complete tape travel stability and long lasting performance. Automatic and Manual Reverse Playback.

Integrated Akai Quality Features for Unparalleled Performance
New AC Servo Motor
The new Akai AC Servo Motor employed in this model for direct capstan drive is equipped with 114 gears on both the rotor and stator sides and a detector coil and magnet are built in on the stator side for a completely new pulse detection system. With this system, pluse detection is made only once every 114 pluses instead of at each pulse for greatly increased pulse output.

Symmetrical head Block, Impedance Roller, and tension Arms for even tape travel in both directions.
For perfectly equal tape speed and even tape tension is both directions, the head block layout is of symmetrical design and the machine is equipped with an impedance roller and tension arms. These features function together as integral parts of this GX Head, AC Servo Motor system for unparalleled stability and long-lasting quality performance.

Automatic and Manual Reverse Playback.
Automatic Reverse Playback is as simple as applying a piece of sensing foil to the tape at desired reversing point. Manual Reverse Buttons  can be operated at any time during plauback.

All GX heads
One each GX Forward Playback, GX Reverse Playback, and combination  GX Recording/Erase head guarantees long lasting performance. As is well known, the core of these heads are made of single crystal and are mounted and set in glass. The wear-free characteristics of these materials permit a perfectly lineal head gap for a "focused field" system and optimum head-to-tape contact which results in a wider dynamic range with excellent Signal-to-Noise ratio.

Track System:  4-track, 2-channel stereo/monaural
Reel Capacity:  up to 7" reel
Tape Speed:  7-1/2 and 3-3/4 ips
Wow and Fluter: 
less than 0,06% WRMS at 7-1/2 ips;
less than 0,08% WRMS at 3-3/4 ips
Frequency Response: 
Low Noise Tape LN-150-7 :
30 - 23,000 Hz (±3 dB) at 7-1/2 ips
30 - 19,000 Hz (±3 dB) at 3-3/4 ips
Distortion:  less than 1,0% (1,000 Hz, 0 VU)
Signal-to-Noise Ratio (measured via tape with peak recording level of +6 VU):  Better than 60 dB
Erase Ratio:  better than 70 dB
Bias Frequency:  100 kHz
1 x  GX recording/erase combination heads,
1 x GX Forward Playback,
1 x GX Reverse Playback
1 x AC Servo Motor for  capstan drive ;
2 x Eddy-current motors for  reel drive
Fast Forward / Rewind Time:  75 sec using 1200 ft tape
Output Jacks:
Two Line :  0,775 V, "0" VU (required load impedance more than 20 k Ω)
One Phono :  30 mV/ 8 Ω
Two Speaker :  Continuous Power Output 7 watts per channel minimum RMS at 8 Ω load impedance from 100 Hz to 20,000 Hz, both channels fully driven to rated per channel power with no more than 3% Total Harmonic Distortion
Input Jacks:
Two Line :  70 mV
Two Microphone :  0,3 mV/4,7 k Ω
DIN Jack:  0,5 V/25 mV
Semiconductors:  41 Transistors, 28 Diodes,
Power Requirements:  100 V to 240 V AC, 50/60 Hz
Power Consumption:  90 W
Dimensions (W x H x D):  440 x 395 x 205 mm (17,3 " x 15,6" x 8,1")
Weight:  15,2 kg (33,4 lbs)

Nessun commento:

Posta un commento