Technics RS-646D(D-46)
¥ 65,800 (around 1976)
Commentary
Portable stereo cassette deck that is portable.
An electronically controlled DC servo motor is used as the drive motor.
It is equipped with a full auto-stop mechanism. When the tape reaches the end of the tape in all operations of REC/PLAY/FF/REW, the mechanism is automatically released and the STOP state is set.
Equipped with a silent stop mechanism to prevent the release sound of the mechanism.
Equipped with a level lock mechanism convenient for fade-in and fade-out.
As a noise reduction system, Dolby NR circuit is mounted.
The recording input can be switched by the selector to a 20 dB microphone Attenuator in addition to the line and microphone.
It has a built-in limiter circuit that enables sound recording with less distortion even when input is excessive.
Equipped with a 2-stage tape selector with independent bias and equalizer.
Uses LH head with excellent recording and re-recording characteristics and long life.
In addition, the erasing head has a ferrite structure that does not cause slippage, and uses a double-gap type with high erasing efficiency.
The amplifier section pursues high linearity and low noise, and measures such as the adoption of IC are taken.
Equipped with a battery check switch to indicate the depleted state of the battery.
Uses a meter light switch that turns on only when necessary.
It uses 3 power source system which can be driven by electric power line, battery and car battery.
It contains a 10 cm aperture monitor speaker and a 0.8W output monitor amplifier.
Model Rating
| Type | Portable stereo cassette deck |
| Head configuration | Recording : LH For Erase : Double Gap Ferrite |
| Motor used | One electronically controlled DC motor |
| Frequency characteristic | Normal : 30 Hz to 14 kHz CrO2 : 30 Hz to 16 kHz |
| Signal-to-noise ratio | Dolby out:50dB Dolby in : 5 kHz or more, 10 dB improvement |
| Wow flutter | 0.08%(WRMS) |
| Input Sensitivity / Impedance | Mic : 0.25 mV (-72dB) / 400 Ω ~ 10k Ω Line in:60mV(-24dB) |
| Output Level / Impedance | Line out : 420mV/50k Ω or more Headphone : 65mV/8 Ω |
| Spekers | 10 cm cone type |
| Monitor output | 0.8W |
| Semiconductor used | Transistor : 39 IC : 2 Diode : 22 pcs |
| Pwer | 100 VAC, 50Hz/60Hz 12 VDC (8 D Batteries) |
| Power consumption | Approx. 9W |
| External dimensions | Width 363x Height 106x Depth 280 mm |
| Weight | Approx. 5.7 kg |