1971 4000 X
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Identical to the 6000 X but with an inbuilt 10 watt RMS per channel stereo amplifier and twin internal 4" x 7" speakers

In brief, the 4000 X was a three-speed single motor recorder with four heads (erase, record, playback and crossfield bias) providing three tape speeds and a seven inch reel capacity.

Continuously variable dual-concentric bass and treble knobs were provided and affected playback only through the speakers and headphones.

See specifications for more detail.

A user manual for this recorder is featured on the CD ROM.


 

 

Specifications
Year of manufacture
1971-74
Model
Series 4000X
Track config
4-track or 2-track stereo
Heads
separate erase, record, playback and crossfield bias
Speeds
7½, 3¾, and 1 ips
Frequency response (DIN 45511)
7½ ips: 40 - 22kHz, 3¾ ips: 40 - 18kHz, 1 ips: 40 - 10kHz
Wow & flutter (W.R.M.S.)
0.07%, 0.14% and 0.28% (measured W.R.M.S.)
Speed tolerance
1%
Motors
single hysteresis Synchronous
Maximum reel size
7"
Signal-to-noise ratio
four-track: 60 dB, two-track: 62 dB
Fast wind time
1200ft - 1 min 45 sec; 1800ft - 2 min 10 sec
Crosstalk
Mono > 60dB; Stereo > 50dB (at 1,000Hz)
Erase & bias frequency
85.5kHz. Distortion less than 0.5%
Inputs
Mic: (balanced) impedance 200 - 700 ohm sens. 70uV max 70mV
Line: impedance 100kohms sens. 5mV max 15V
Phono: magnetic- 33 kohms, 1mV @ 1000Hz
Outputs
Emitter follower: 200ohms/1.5V; Line: 5kohms/160mV; Radio: 5kohms/0.75V; Stereo headphone socket min imp 200ohms/1.5V
Audio power output
2 x 10 watts R.M.S.
Speakers
two internal 4" x 7" speakers
Dimensions
15½" x 12½" x 6½" (394 x 318 x 165mm)
Weight
23 lbs (10.6kg)