Category:Mid High Fidelity
Country of Manufacture:Japan
Release dates:1969 - 1972
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:7½ ips: 20Hz to 22kHz 3¾ ips: 20Hz to 15kHz
Wow and Flutter:less than 0.09% RMS at 7½ ips, 0.15% at 3¾ ips
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
in late 1969, the TC 666D was a quarter-track, three motor auto reverse
stereo tape deck featuring what Sony described as ‘Sony ESP (Electronic
Sensory Perceptor) – a function which automatically reversed tape direction
from right to left without the need of magnetic cue strips.
Operating at two speeds, 7½ and 3¾ ips, a frequency
response of 20Hz to 22kHz was claimed at the former and 20Hz to 15kHz
at the latter.
Other features included feather-touch solenoid transport
controls, sound-on-sound, high frequency bias and Sony’s own noise reduction
system (SNR) which, according to Sony, automatically reduced gain during
quieter passages, hence eliminating unwanted background noise.
Hum and noise: 59dB at 7½ ips / Harmonic distortion: 1.6% / Bias frequency: 160kHz / Rewind speed: 100 seconds for 1200ft / Inputs: mic: 600kohm -72dB. aux: 100kohm 61mV / Outputs: line 100k 0.775V. headphone 8 ohm (31mV) / Dimensions: 17.2 x 8.1 x 16.6″ (437 x 205 x 422mm) / Weight: 48.5 lbs (22 kg) / quarter-track stereo