DIATONE DT-4000
¥ 36,000 (around 1970)
Commentary
A stereo cassette deck developed for high-fidelity recording and playback.
Excellent wow and flutter characteristics are obtained by belt drive with outer rotor type hysteresis synchronous motor and large flywheel.
A cut-core type power supply is installed to suppress leakage noise from the power supply.
The amplifier is a direct connection method for each stage, and is designed with low distortion by applying a large amount of FB.
The operation buttons are lever operated, the recording and stop buttons are color-coded, and the music cassette is equipped with an error recording prevention mechanism to prevent accidental deletion.
It is equipped with independent slide volume on the left and right, temporary stop lever and VU meter.
The headphones are designed as independent circuits so that they can be monitored regardless of the lineout.
Equipped with a tape counter.
Model Rating
Type | Four track, two channel cassette deck |
Tape type | Cassette |
Truck type | 4-track 2-channel stereo |
Tape speed | 4.8cm/s |
Fast-forward and rewind time | 70 seconds or less (at C-60) |
Recording system | AC bias |
Process of elimination | AC Erase |
Frequency characteristic | 50 Hz to 10 kHz ± 3 dB |
Wow and flutter | 0.14% Wrms or less |
Signal-to-noise ratio | 45 dB or more |
Bias frequency | 55kHz |
Regeneration time constant | 120 μ sec |
Input Sensitivity / Impedance | Mic : 0.3mV/1k Ω Aux : 0.1mV/330k Ω Din:30mV |
Output Level / Impedance | Output : 0.5V/2.2k Ω Din : 0.5V/2.2k Ω Headphone : 8 Ω or more |
Motor used | Outer rotor hysteresis synchronous motor |
Semiconductor used | Transistor : 17 Diode : 12 pcs |
Power supply voltage | 90 VAC ~ 110 V, 50Hz/60Hz |
Power consumption | 20W |
External dimensions | Width 290x Height 86x Depth 215 mm |
Weight | 4.2kg |