Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1972 - 1976
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Ferrite/Glass
Head Configuration: Stereo
# Motors: 3
Frequency Response:( 3dB): Using low noise tape: 30Hz - 25kHz, zero VU at 7½ ips Using regular tape: 30Hz - 23kHz, zero VU at 7½ ips
Wow and Flutter:less than 0.08% RMS at 7½ ips, less than 0.12% RMS at 3¾ ips
Signal-to-Noise Ratio:better than 50 dB
Sound quality rating:6 / 10
Long-term reliability rating: 7 / 10
Weight: Weight: 33.9 lbs (15.4 kg)
This was a 4-track stereo tape-deck featuring auto-reverse on both record and playback.
Main drive was via a direct capstan drive Servo-Control motor which combined the winding control of an ordinary eddy-current motor and a speed-detecting toothed cog-wheel into a single structure mechanism, eliminating the need for drive-belts, pulleys, idlers and flywheels. Speed was electronically controlled. Two eddy-current outer rotor motors (for supply and take-up reels) eliminated tape stretch and allowed for smooth tape travel and ideal starting torque.
Maximum reel size was 7″ and speeds were 7½ and 3¾ ips.
Other features included “Compute-O-Matic” recording level control, Built-in mic/line mixing, Tape selector switch for low-noise tapes, Off-tape monitoring during recording, Automatic stop/shut-off, Optional remote
control and Direct function change system which enabled switching from one function to another without having to use stop.
GX (glass crystal) Ferrite heads were used in an unusual configuration.
A symmetrical head block with a short tape path was equipped with two fixed record/erase combo heads and one moveable playback head.
Equalisation: correct equalisation for playback of tapes recorded to the NAB curve / Crosstalk: better than 45 dB (stereo) / Distortion: less than 1.5% (1,000 Hz, zero VU) / Bias frequency: 102 kHz / Erase ratio: better than 70 dB / Rewind speed: 75 seconds for 1,200 ft / Inputs: Microphone (2): 0.3 mV / 4 to 7Kohms Line(2): 60 mV / 50 Kohms DIN jack 0.5V / 60 mV (high). 5mV (low) / Outputs: Line: 1.23 (0 VU) / 100 ohms (req’d load impedance > 20Kohm) / Dimensions: 14.5 x 14.6 x 8.9″ (368 x 371 x 227mm)