Category:Vintage (Pre 1960, some recorders were so good, they belong in above categories)
Country of Manufacture:Japan
Release dates:1966 - 1969
Speeds: 1 7/8, 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:( 3 dB): 7½ ips: 30 to 23kHz
Wow and Flutter:less than 0.12% at 7½ ips
Signal-to-Noise Ratio:better than 50dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
A cross-field head quarter-track stereo tape deck (no inbuilt amplifiers or speakers) featuring three speeds,
three heads and a hysteresis synchronous 2-speed motor.
Around about this time Akai began to differentiate between recorders (with full audio output stages) and tape-decks only with the “D” suffix denoting the latter.
Like all the preceding Akai models the 150D utilized the same 2-lever control system and a removable capstan sleeve to get three playing speeds from the two-speed motor.
An optional fourth speed of 15 ips was available on request and implemented by using a larger capstan sleeve along with a smaller pinch roller. Maximum reel size was 7″ and the unit utilized 11 silicon transistors
and 2 diodes.
Semiconductors: 11 silicon transistors and 2 diodes. / Dimensions: 13½” x 13½” x 9″ (343 x 343 x 230mm) / Weight: 30.8 lbs (14kg) / quarter-track stereo