Country of Manufacture:Japan
Original Price: $1450
Speeds: 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Quad
Frequency Response:( 3dB): 15 ips: 30Hz - 22kHz (standard tape). 30Hz - 28 kHz (SLH tape) 7½ ips: 30Hz - 17kHz (standard tape). 30Hz - 23 kHz (SLH tape)
Wow and Flutter:0.04% at 15ip, 0.06% at 7½ ips
Signal-to-Noise Ratio:56db (SLH tape), 53dB (standard tape)
Sound quality rating:6 / 10
Long-term reliability rating: 7 / 10
At around $US 1595, the TC-788-4 Quadradial was one of the most expensive tape decks Sony ever produced. It offered two speeds – 15 and 7½ , three heads, 10½ ” reel capacity, four- track four-channel recording and playback operation
and an AC servo controlled capstan drive motor which provided constant
speed regardless of voltage and load changes.
A closed loop dual capstan tape drive system assured positive tape to
head contact and helped to isolated external vibration. Logic controlled
function buttons gave feather touch direct transport switching from any
mode to another mode without having to stop the tape first.
A synchro track facility allow ed synchronised recording of new tracks
with previously recorded tracks and there was provisions for timer controlled
recording or playback. Separate tape equalization and bias selector switches
were provided to optimize the characteristics of any tape and a PAN POT
facility enabled back to front channel mixing, especially useful for multi
mic stereo recordings.
Additional images of this recorder are featured on the Get Reel Contemporary