Country of Manufacture:Japan
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Dimension: 358 x 360 x 248mm (14 x 14.1 x 9.8")
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 3
Frequency Response:( 3dB): 7½ ips: Using low noise tape: 30Hz - 21kHz (30Hz - 18kHz regular)
Wow and Flutter:less than 0.14% at 7½ ips, less than 0.18% at 3¾ ips
Signal-to-Noise Ratio:50 dB at maximum tone control
Sound quality rating:6 / 10
Long-term reliability rating: 7 / 10
Weight: 13.2 Kg (29 lbs)
New in 1973, the 1721 was a deluxe, self-contained two-speed quarter-track stereo tape recorder with all-silicon transistor circuitry and twin in-built 5 x 7″ speakers.
The recorder was available in either a wooden case (1721W) or leather-finish on wood case (1721L) and one could choose either a black (pictured) or silver finish.
Still sporting the now almost 12 year-old Akai twin-lever transport operation system, this machine featured two large VU meters, a three digit tape counter, front panel microphone jacks, low noise tape selector switch
plus a magnetic phono cartridge input.
Half track versions were also available (W-H and L-H) and this version only had a single channel power amplifier and one internal speaker.