Technics RS-678U
¥ 96,800 (around 1976)
Commentary
Stereo cassette deck with horizontal drive 2-motor system.
FG servo DC motor is used for constant speed running.
An HPF head has been adopted for the head.
Transistor is used for the switch element to prevent noise generation due to contact and improve reliability.
Equipped with 2 types of muting circuits, noise generation at power ON/OFF, recording / reswitching, and STOP is suppressed.
Equipped with a 2-stage switching tape selector with independent bias and equalizer.
Equipped with Dolby NR circuit.
Equipped with a memory rewind and play mechanism.
Equipped with a meter capable of peak checking by switching the switch.
The line and microphone can be mixed.
Recording of absence is possible by combining with an optional timer.
Model Rating
| Type | Stereo cassette deck |
| Head configuration | HPF for recording and replay For Erase : Double Gap Ferrite |
| Motor used | 1 FG Servo DC Motor 1 DC Motor |
| Frequency characteristic | Normal : 20 Hz to 15 kHz CrO2 : 20 Hz to 17 kHz |
| Signal-to-noise ratio | Dolby out:52dB Dolby in : 5 kHz or more, 10 dB improvement |
| Wow flutter | 0.06%(WRMS) |
| Input Sensitivity / Impedance | Mic : 0.3 mV (-70dB) / 600 Ω ~ 20k Ω Line in:60mV(-24dB) |
| Output Level / Impedance | Line out : 420 mv (-7.5 db) / 10k Ω or more Headphone : 65mV/8 Ω |
| Semiconductor used | Transistor : 49 FET : 2 Diode : 33 pcs Other semiconductors : 4 pcs |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | Approx. 20W |
| External dimensions | Width 450x Height 173x Depth 341 mm |
| Weight | Approx. 10.0 kg |