Specifications - Akai 1722W Service Manual

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I. SPECIFICATIONS
An asterisk next to a figure indicates the minimum guaranteed performance.
TRACK SYSTEM 4-track 2-channel stereo/monaural system. —-- =a
REEL CAPACITY
TAPE SPEED
WOW AND FLUTTER
Up to 7" reel
7-1/2 and 3-3/4 ips. +2% (*4+3%)
Less than 0.14% (*0.15%) R.M.S. at 7-1/2 ips.
Less than 0.18% (*0.20%) R.M.S. at 3-3/4 ips.
TOTAL WOW AND FLUTTER Less than 0.22% R.M.S. at 7-1/2 ips.
(Scotch #175 TAPE 3,000 Hz recording and playback)
FREQUENCY RESPONSE
WIDE RANGE TAPE
LOW NOISE TAPE
1,000 Hz -16VU Recording, measured at speaker output
30 to 21,000 Hz (*50 to 20,000 Hz)+3 dB at 7-1/2 ips.
40 to 15,000 Hz (*50 to 12,000 Hz)+3 dB at 3-3/4 ips.
30 to 18,000 Hz (*50 to 18,000 Hz)43 dB at 7-1/2 ips.
40 to 13,000 Hz (*50 to 10,000 Hz)+3 dB at 3-3/4 ips.
DISTORTION FACTOR Less than 2% at 7-1/2 ips.
TOTAL DISTORTION FACTOR Less than 3% at 1,000 Hz "0''VU recording at 4 mV mic Input,
Output 2W and Tone Control Max using Scotch #211
SIGNAL TO NOISE RATIO Better than 50 dB (*47 dB) at 10 dBm output and
Tone Control Max (from Speaker Out)
TOTAL SIGNAL TO NOISE RATIO
Better than 43 dB at 10 dBm output and Tone Control Max.
(from Speaker Out)
CROSS TALK
Better than 60 dB (*55 dB) Monaural (Mic input 4 mV,
1,000 Hz +3 VU recording, measured at line output)
Better than 45 dB (*43 dB) Stereo (mic input 4 mV,
1,000 Hz +3 VU recording, measured at line output)
ERASE RATIO
Better than 70 dB (*65 dB) 1,000 Hz +3 VU recording
INPUTS
MIC INPUT
LINE INPUT
DIN INPUT
OUTPUTS LINE OUTPUT
DIN OUTPUT
PHONE OUTPUT
SPEAKER OUTPUT
RECORDING BIAS FREQUENCY
Volume at maximum, 1,000 Hz "0" VU indication
More than 0.5 mV
More than 70 mV
More than 70 mV (High)
More than 5 mV (Low)
OV (volume min) to 2.3V (volume max) using a 250 Hz eel
"0" VU pre-recorded tape at 7-1/2 ips.
1V
100 mV at 82 each CH.
3W/82 each CH.
*More than (2W/2W) continuous power at 82
63 kHz+8%
BIAS LEAK Less than -20 VU measured at line output
HIGH FREQUENCY DEVIATION
RECORDING CAPACITY
FAST FOWARD AND REWIND TIME
MOTOR
With 2 dB using an 8,000 Hz 3-3/4 ips. pre-recorded tape at
7-1/2 ips. Tone Control Max
2 hours stereo recording using a 1,200 ft. tape at 3-3/4 ips
80/100 sec. using a 1,200ft. tape at 60/50 Hz
2-4 pole induction 2-speed motor.
type: IC-16Y
Revolutions: 1,790/1,490 r.p.m. at 60/50 Hz (Low Speed)
3,580/2,980 r.p.m. at 60/50 Hz (High Speed)
HEADS RECORDING/PLAYBACK HEAD
ERASE HEAD
Type: P4-150 Gap: 2 microns
Impedance: 1,25022415% at 1,000 Hz
D.C. Resistance: 912
Type: E4-200 Gap: 0.6 mm
Impedance: 2002+5% at 100 kHz
D.C. Resistance: 22 :