Audio Database

Image of CT-4
Commentary

This is a stereo cassette deck with full functions such as tape selector, Dolby system, and standby mechanism for voice recording.

The motor is equipped with a DC-motor with a built-in servomechanism using a generator, and a precisely finished capstan and flywheels are driven by flat belt.

Equipped with a tape selector with built-in automatic switching mechanism for chrome tapes with detection holes.

Equipped with a Dolby system that greatly improves tape hissing.

Equipped with a standby mechanism that can record absence and play alarm clock by connecting and setting a separately sold timer.

Built-in full auto-stop mechanism using Hall element.

Model Rating
Type Stereo cassette deck
Heads Re-recording : 1 hard permalloy head
Erase : 1 ferrite head
Motor One electronically controlled DC motor with built-in generator
Quick winding speed 85 seconds or less (at C-60)
Uneven Rotation (WRMS) Not more than 0.08%
Frequency characteristic General, LH Tape : 30 Hz ~ 14 kHz, 40 Hz ~ 13 kHz ± 3 dB
Chrome Tape : 30 Hz ~ 16 kHz, 40 Hz ~ 15 kHz ± 3 dB
Ferrichrome Tape : 30 Hz ~ 16 kHz, 40 Hz ~ 15 kHz ± 3 dB
S/N
Generic, LH tape Dolby off : 52 dB or more
Dolby on : 62 dB or more (5 kHz or more)
When using chrome tape : 4.5 dB improvement (over 5 kHz)
Distortion factor Not more than 1.7%
Input Sensitivity / Maximum Allowable Input
/ Impedance
Microphone : 0.23mV/80mV/23k Ω (Compatible Microphone Impedance 250 Ω ~ 30k Ω)
Line : 64mV/25V/100k Ω
DIN : 10mV/3.6V/2.2k Ω
Reference output level / maximum output level
/ Impedance
Line : 450mV/800mV/50k Ω
DIN : 450mV/800mV/50k Ω
Headphones : 60mV/107mV/8 Ω
Semiconductor used Transistor : 49 (For Motor Electronic Control : 3)
FET : 4 pcs
Diode : 38 Pieces (For Motor Electronic Control : 1 Piece)
Zener diode : 3 pcs
Light Emitting Diode : 3
Pwer 100 VAC, 50Hz/60Hz
Power consumption 15W
External dimensions Width 380x Height 150x Depth 316 mm
Weight 7.5kg
Attachment 2 stereo connection code
One Head Cleaning Kit