4-Head 3-Motor Automatic Reverse Surround Stereo Tape Deck
Akai's GX Head 4-Channel Surround Stereo system eliminates the inability to pick up and reproduce true concert hall sound. Every pitch of sound and reverberation effect is reproduced with all of the exciting "sense of presence" experienced when attending a live concert. Akai's surround stereo supplements conventional stereo's two front speakers with two additional rear speakers to front the "2-2 system". The listener is surrounded by two sets of speakers (left & right front and left & right rear). This arrangement does not mean, however, that simply adding two speakers to a 2-channel stereo system is all that is necessary for 4-channel stereo playback. Four separate recordings are made using four individual channels (four tracks in one direction) of the magnetic recording tape. This 4-channel stereo tape feeds into four pre and main amplifiers to activate a 4-speaker system. Thus, at playback time, sounds from separate channels are emitted from each speaker providing the listener with a feeling that he is listening to concert hall sound from the best seat in the auditorium. Model GX-280D-SS is a compatible 4-channel/2-channel stereo model. For 2-channel stereo operation, only the front channels are utilized. For exciting 4-channel surround stereo, a 4-channel stereo external amplifier or two 2-channel stereo amplifiers can be used to activate a 4-speaker system.
GX (Glass & Crystal Ferrite) Head
Akai has equipped this model with its new and amazing Glass & Crystal Ferrite Recording and Playback heads to bring you unequalled open reel high fidelity sound. With the Glass & Crystal Ferrite head, superbly wider frequencies with clear highs can be recorded in all their true fidelity with low noise tape. In other words, with the GX head, a high dynamic range and excellent Signal-to-Noise Ratio are achieved. The secret of this quality head is made of single crystal ferrite and is mounted and set in glass. The superior high range characteristics are contributable to thw structure of the head gap which focused the magnetic field into a sharp oblong radius. This focused field recording system minimizes high frequency loss, eliminating undue equalization and achieving a wider dynamic range.
Specifications
Track System: 4-track, 4/2-channel stereo/monaural system
Reel Capacity: up to 7" reel
Tape Speed: 7-1/2 and 3-3/4 ips (±0,5%)
Wow and Flutter:
At 7-1/2 ips : less than 0,10% RMS
At 3-3/4 ips : less than 0,15% RMS
Frequency Response (using Low Noise Tape)
At 7-1/2 ips : 20 Hz to 25,000 Hz (±3 dB)
At 3-3/4 ips : 30 Hz to 20,000 Hz (±3 dB)
Frequency Response (using Regular Tape)
At 7-1/2 ips : 30 Hz to 23,000 Hz (±3 dB)
At 3-3/4 ips : 30 Hz to 19,000 Hz (±3 dB)
Distortion: less than 0,8% (1,000 Hz, "0" VU)
Signal-to-Noise Ratio: 55 dB
Erase Ratio: better than 70 dB
Bias Frequency: 110 kHz
Heads : 4 - GX recording and playback, full-track erase, 2-channel erase head
Motors: 3 - One Servo motor for direct capstan drive, two 6-pole outer-rotor motors for supply and take-up reel drive
Fast Forward and Rewind Time: 90 seconds using a 1200 ft tape at 60 Hz
Recording Capacity:
2-channel Stereo : 2 hrs (1,200 ft tape, 3-3/4 ips)
4-channel Stereo : 1 hr (1,200 ft tape, 3-3/4 ips)
Output Jacks
Line : 4x 1,23 V (0 VU)/10 k Ω ; Required load impedance more than 25 k Ω
Phone : 2x 40 mV/8 Ω
Input Jacks
Microphone : 4x 0,5 mV/10 k Ω
Line : 4x 0,1 V/150 k Ω
DIN Jack: 2x 0,4 V/60 mV (High) 10 mV (Low)
Semiconductors: 68 Silicon Transistors; 52 Diodes
Power Requirements: 100 V to 240 V 50/60 Hz
Power Consumption: 140 W
Dimensions (W x H x D): 435 x 505 x 250 mm (17,4" x 20,2" x 10")
Weight: 22,4 kg (49,5 lbs)