AMPEX ATR-700 professional reel-to-reel tape recorder 

Specifications:
Track System:  Full, half and quarter-track mono and stereo versions are available
Heads:  (3) Erase, record and playback – a fourth playback head could be added
Motors:  3 motor direct capstan drive
Maximum reel size:  10½”
Tape speeds:  3¾ and 7½ ips or 7½ and 15ips
Pitch control:  adjustable ±5 %
Tape speed accuracy:  within ± 0.3% at both speeds
Wow & Flutter:  0.08% at 7½ and 15 ips. 12% at 3¾ ips WRMS
Frequency Response:  40Hz-100Hz +3, -2dB and 100Hz to 15 kHz ±2dB at 7½ ips
S/N Ratio:  A weighted 60dB (2-track) and 55dB (4-track)
Rewind Speed:  90 seconds for 1200 feet tape
Dimensions:  21 x 17 x 10 inches (533 x 356 x 254 mm)
Weight:  62 lbs (28.2kg)