Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1971 - 1975
Speeds: 1 7/8, 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Dimension: 14 x 14 x 8.9" (358 x 358 x 227mm)
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 3
Frequency Response:( 3dB): 7½ ips: 30Hz - 26KHz
Wow and Flutter:(less than) 0.08% at 7½ , 0.12% at 3¾ and 20% at 1 ips
Signal-to-Noise Ratio:better than 50 dB at maximum tone control
Sound quality rating:5 / 10
Long-term reliability rating: 6 / 10
Weight: 37.5 lbs (17 kg)
A smartly designed, solid state stereo ‘Custom’ deck with auto reverse and featuring three heads: erase, combined record/playback and an Akai patented cross-field head bias.
Auto reverse was enabled via foil tape inserts for continuous playback in both directions .
Three motors were employed. a hysteresis synchronous three-speed motor for capstan and two 6-pole outer-rotor motors for supply and take-up reels.
Slide type level controls were provided and the standard Akai two-lever transport operation was retained. Tape lifters ensured quiet wind/rewind and ensured minimum tape and head wear.
Hum and noise: less than 10mV at minimum tone control / Distortion: less than 2% (1,000 Hz “0” VU) / Bias frequency: 100 kHz / Erase ratio: better than 70 dB / Semi-conductors: 14 transistors and 2 IC’s / Rewind speed: 75 seconds for 1,200 ft / Equalisation: correct equalisation for playback of tapes recorded to the NAB curve / Inputs: Microphone: more than 0.5mV Line: more than 50mV DIN: more than 50 mV (high), more than 5mV (low) / Outputs: Line: ‘0’ VU (1.23V) DIN 0.4V Headphones: 150 mV / 8 ohms / quarter-track stereo (half-track version also available)