Technics RS-620U
¥ 49,800 (around 1976)
Commentary
A cassette deck with a Dolby NR circuit.
LH head is adopted for the head.
As a noise reduction system, it is equipped with a Dolby NR circuit that can reduce the hissing to approximately 1/3 in the middle and high frequency range.
It is equipped with separate volume for microphone input and line input, and mixing is possible.
Equipped with a tape selector that adjusts sensitivity in addition to switching bias and recording / playback equalizer.
It has an output volume.
The amplifier section is designed to make great use of a printed circuit board, and reliability is improved by embedding components directly into the board.
Model Rating
| Type | Cassette deck |
| Tape drive system | 1-motor belt drive system |
| Motor used | Electronically controlled DC motor |
| Head Used | Recording / Reproducing : LH Head For Erase : Double Gap Ferrite Head |
| Wow flutter | 0.14%(WRMS) |
| Signal-to-noise ratio | Dolby out:49dB Dolby in : 5 kHz or more, 10 dB improvement |
| Frequency characteristic | Normal : 30 Hz to 13 kHz Chrome : 30 Hz to 15 kHz |
| 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) / 50k Ω or more Headphone : 60mV/8 Ω |
| Semiconductor used | Transistor : 22 FET : 2 IC : 2 Diode : 11 units Other Semiconductors : 5 Pieces |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | Approx. 7W |
| External dimensions | Width 394x Height 123x Depth 248 mm |
| Weight | Approx. 4.5 kg |