Technics RS-724U
¥ 43,000 (released in 1971)
¥ 54,500 (around 1974)
Commentary
A tape deck capable of playing back discrete 4-channel tapes.
The head section consists of two heads, an erasing head and a newly designed recording / reproducing head for 4-channel tape playback.
It is equipped with 2 meters, and the output level of front (ch1, ch3) and rear (ch2, ch4) can be displayed by switching the switch.
In addition, this switching function is linked to the headphone output, and the output of the headphone is also switched simultaneously.
Stereo microphone recording is possible by using an optional microphone.
The Mic and Aux inputs can be mixed.
National unique gold mechanism is adopted, and stability is improved by eliminating uneven rotation and vibration.
It is equipped with an automatic stopping device to prevent the tape from being damaged. When the tape is wound up, the shut-off switch activates and the motor automatically stops.
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Model Rating
| Type | 4-track multichannel tape deck | ||||||
| Recording bias system | AC Bias, 85 kHz | ||||||
| Erasing method | AC erasing method | ||||||
| Track system | 4-track 2-channel stereo | ||||||
| Tape speed | 19cm/s, 9.5cm/s | ||||||
| Head Used | 4 ch playback / 2 ch recording / playback : Permalloy x1 Erase : 1 ferrite |
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| Motor used | Induction motor | ||||||
| Frequency characteristic | 19cm/s : 30 Hz to 18 kHz (50 Hz to 15 kHz ± 3 dB) 9.5cm/s : 30 Hz to 13 kHz |
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| Wow flutter | 19cm/s : 0.1% or less | ||||||
| Signal-to-noise ratio | 50 dB or more | ||||||
| Input | Mic : Maximum input sensitivity 0.5 mV (-66dB) / 20k Ω Line in : Maximum input sensitivity 45 mv (-27dB) / 100k Ω |
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| Output |
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| DIN connector | REC/PB(EIAJ) | ||||||
| Headphone | 8 Ω | ||||||
| Semiconductor used |
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| Pwer | 100 VAC, 50Hz/60Hz | ||||||
| Power consumption | Approx. 40W | ||||||
| External dimensions | Width 391x Height 170x Depth 330 mm | ||||||
| Weight | Approx. 7.6 kg |