Introducing
the A-4.
Four
tracks on quarter-inch tape (a format our engineers pioneered) at a price
that's as irresistible as we could make it. The A-4 drives 7" reels at
either 7½ ips or 15 ips. So you
can decide between the ultimate in multitrack economy or push for those extra
dB's of sound quality.
Like its
8-track big brother, the A-4 has a transport system built from the ground up
specifically for multitrack recording. Three low power consumption D.C. motors
are used to eliminate the heat problems typical of A.C. motors. And an FG servo
controls the capstan motor to prevent line voltage fluctuations from playing
havoc with your sound.
The A-4 is a
classic three-head design. Separate heads are used for recording, playback and
erasing. We;ve even designed a new specially contoured head that gives you
extended frequency response and fewer low frequency head bumps.
Operation is
fast and easy, too. Select the tracks you want to record on. Then enter the
record mode . The A-4 is set up to record where you want to record and
automatically play back the other tracks. It also lets you punch in or out at
the touch of a botton with no cliks or pops.
You can buy
an optional remote foot-switch that gives you a third hand for punching in and
out. Just play along with your song, then tap the footswitch to start
recording. You'll be able to concentrate onn your music instead of your
machine.
The A-4
brings you the kind of convenience we introduced on the A-8. easy to use
digital tape counter with bright LED readout. And the Return To Zero memory
function for fast tape checks. There's a ±10% pitch control for special
effects, optional Dolby C noise reduction system, easy to use. Edit mode with
tape dump capabilities and modular electronics for fast economical servicing.
It all adds
up to an easy to use, easy to afford multitrack recorder. That's the A-4.
Specifications
Tape: 1/4 inch tape width, 1 mil base
Format
: 4 track, 4 channel
Heads: 4 track record; 4 track reproduce, 4 track
erase
Reel
Size: 7 inch
Tape
Speed: 15 and 7½ ips (38 and 19 cm/s) ±0,5%
Pitch
Control: ±10%
Line
Input: -10 dBV (0,3 V) / impedance 30 k
Ω unbalanced
Line
Output: -10 dBV (0,3 V) load impedance
10 k Ω or higher unbalanced
Record Level
Calibration Equalization: 0 VU
referenced to 250 nWb/m of tape flux NAB
Wow and
Flutter:
±0,06% peak
(IEC/ANSI) wtd., at 15 ips
±0,10%
peak (IEC/ANSI) wtd., at 7½ ips
Fast Wind
Time: 130 seconds typ typ. for 1800 ft
of tape
Overall
Frequency Response:
At 15 ips
: 40 Hz - 20 kHz ±3 dB
At 7½ ips ;
40 Hz - 18 kHz ±3 dB
Signal-to-Noise
Ratio (Sync/Reproduce)
At 15 ips
; 65 dB wtd.
At 7½ ips :
referenced to 1 kHz , 3% T.H.D. level
Total
Harmonic Distortion: less than 1% at 1
kHz 0 VU
Crosstalk
(Reproduce): 50 dB (at 1 kHz)
Erasure: better than 70 dB at 1 kHz
Power
Requirements: 120 V AC 60 Hz , 35 W
Dimensions
(W x H x D): 360 x 340 x 170 mm
(14" x 13-1/2" x 6-3/4")
