Technics RS-B70
¥ 59,800 (around 1983)
Commentary
A two motor cassette deck equipped with dbx as a noise reduction system.
For recording digital sources such as CDs, it is equipped with dbx, which has a noise reduction effect of 30 dB or more.
In addition, it is designed for 3 nr with Dolby B and CNR.
The AX amorphous head made of amorphous alloy is used for the recording / reproducing head, thereby realizing excellent high-frequency characteristics and distortion characteristics.
The mechanism uses a 2-motor computer logic system to achieve stable tape travel and reliable operation.
The display is equipped with a wide-range FL meter.
It is equipped with a single-track repeat function that enables repeated playback up to 16 times, and a 20-track skip selection function that enables quick cue of a song.
Equipped with a 4-way digital counter that displays the remaining tape time, rec-mute elapsed time, 20-song skip selection instruction and 3-digit tape count.
Equipped with an auto input selector and an auto tape selector.
Equipped with a timer standby mechanism.
Model Rating
| Type | Stereo cassette deck |
| Heads | Recording : AX Amorphous Head Erasing : double-gap ferrite |
| Motor | Capstan motor (electronically controlled DC) Reel motor |
| Wow flutter | 0.045%(W.R.M.S.) ± 0.08% (W. Peak, EIAJ) |
| Frequency characteristic | Normal (ED) : 20 Hz to 18 kHz, 50 Hz to 16 kHz ± 3 dB (EIAJ) CrO2(EX) : 20 Hz to 19 kHz, 50 Hz to 17 kHz ± 3 dB (EIAJ) Metal (EM) : 20 Hz to 20 kHz, 50 Hz to 18 kHz ± 3 dB (EIAJ) |
| Dynamic range | 110 dB (dbx IN, 1 kHz, EX Tape) |
| Signal-to-noise ratio | NR off : 58 dB (EX Tape, WTD, 1 kHz, 3% third order distortion) 55 dB (EX tape, EIAJ) Dolby B NR in : 66 dB (EX Tape, WTD, 1 kHz, 3% third order distortion) Dolby C NR in : 72 dB (EX Tape, WTD, 1 kHz, 3% third order distortion) Dbx in : 92 dB (EX tape, WTD, 1 kHz, 3% third order distortion) |
| Input Sensitivity / Impedance | Mic : 0.25mV/400 Ω ~ 10k Ω Line : 60mV/47k Ω |
| Output Level / Impedance | Line : 400mV/1.5k Ω Headset : 20mW/8 Ω (compatible impedance 8 Ω ~ 600 Ω) |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | Approx. 16W |
| Maximum external dimensions | Width 430x Height 98x Depth 273 mm (Including Knob and Rubber Foot) |
| Weight | Approx. 5.1 kg |