Audio Database

DT-4550
Commentary

Stereo cassette deck equipped with Dolby circuit.

The built-in Dolby circuit reduces the tape hissing.

A DC servo motor with a built-in tacho generator is used as the drive motor, which controls the rotation speed of the motor at a constant speed to ensure stable tape travel.

Equipped with a full auto-stop mechanism to protect the tape. In either case of recording / playback / fast-forward / rewind, when the tape is finished, the pinch roller and head block are automatically released and the operation button is returned. This eliminates unnecessary burden on the mechanism and improves durability.

In order to take advantage of the characteristics of the tape to be used, a tape selector with independent bias and equalizer is installed.
The tape types are compatible with normal tape, chrome tape, and SA tape.

Equipped with a mechanical pause mechanism.

Equipped with an oil dump type soft eject mechanism.

By connecting an audio timer (sold separately), you can record your absence or play an alarm clock.

An illumination lamp is mounted in the cassette case.

Model Rating
Type Cassette deck
Track format 4-track 2-channel
Motor DC servo motor with built-in tacho generator
Heads For Recording and Playback : Hard Permalloy Head
For Erasing : Ferrite Head
Tape speed 4.8cm/s
Fast-forward and rewind time About 90 seconds with a C-60 tape
Wow and flutter 0.07%(WRMS)
Frequency characteristic 30 Hz ~ 13 kHz (Normal Tape)
30 Hz ~ 16 kHz (Chrome Tape)
Signal-to-noise ratio Dolby out : 56 dB or more
Dolby in : 64 dB or higher
Equalizer curve time constant 3,180 μ s/120 μ s (Normal Tape)
3,180 μ s/70 μ s (Chrome Tape)
Input Sensitivity / Impedance Mic : -70dBV/1.8k Ω
Line : -20dBV/80k Ω
Output Level / Impedance Line : -7dB/22k Ω
Headphone : -25dBV/8 ohm
Pwer 100 VAC, 50Hz/60Hz
Power consumption 9W
External dimensions Width 480x Height 154x Depth 323 mm
Weight 5.3kg