Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1967 - 1970
Speeds: 1 7/8, 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Dimension: 20 x 13½ × 9½" - 508 × 340 × 240 mm
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 1
Voltage(s): 110-120v, 220-240v
Frequency Response:7½ ips: 30 - 23kHz +- 3dB
Wow and Flutter:< 0.10 % at 7½ ips, < 0.13 % at 3¾ ips, < 0.203 % at 1 ips
Signal-to-Noise Ratio:better than 50dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Weight: 41.8 lbs (19 kg)
Also sold as the Roberts 771X in the USA.
The cabinet came in two versions: teakwood or vinyl with a carrying handle on it.
Like all single motor Akai’s the speed change was handled in an unorthodox manner: the motor ran at two speeds (the little switch on top between the reels) and the third (and optional fourth) speed was achieved by fitting a capstan sleeve. The playback equalisation was changed via a little switch.
The machine has two built-in speakers and the two “flaps” on the side are a kind of sound reflecting device that was often used on Japanese tape recorders of this era.
Semiconductors: 20 transistors, 4 thermistors, 4 rectifiers / Rewind speed: 90 seconds for 1,200 ft reel / Audio output power: 15 watts per channel undistorted / Inputs: low level high impedance mic input, high level line input / Outputs: line, headphones, external speakers / Speaker(s): 2 x 4″ side mounted with deflector flaps / Dimensions: 20 x 13½ x 9½” (508 x 340 x 240 mm) / Weight: 41.8 lbs (19 kg) / quarter-track stereo
Din and 1/4″ Phono Inputs/Outputs