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Technics RS-631

Stereo Cassette Deck (1978-79)

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Technics RS-631


The Technics RS-631 is a front-loading, vertical hold, high fidelity stereo cassette deck with memory auto-play and separate 3-position bias/equalisation selectors.


Type: 2-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.8 cm/s

Heads: 1 x record/playback, 1 x erase

Motor: FG servo DC

Tape Type: type I, FeCr, CrO2

Noise Reduction: B

Frequency Response: 25Hz to 16kHz  (Cr02 tape)

Signal to Noise Ratio: 67dB  (dolby B)

Wow and Flutter: 0.06%

Input: 60mV (line), 0.25mV (mic)

Output: 0.42V (line)

Dimensions: 430 x 149 x 267mm

Weight: 7.6kg


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Reviewed Mar 26th, 2020 by

A truly exceptional cassette deck. I do not want to make comparisons with other products, but I would fit this deck in the hi-fi range of high class. I bought it some time ago, on occasion and opened it to see how it was built; The conclusion is that this deck is a tank, among the audio devices.

Reviewed Nov 21st, 2018 by

Esta pletina de cassette tiene un sonido espectacular, depues de 38 años sigue funcionando perfectamente gracias a la calidad de fabricación en sus componentes mecánicos y electrónicos. No tiene la precisión de lectura de la 641 pero tiene el encanto del aspecto antiguo de sus vumeters grandes y fáciles del leer. He probado la Aiwa L300 y otra inferior Ad-f260 y esta mas antigua se oye mejor.
Es un trabajo magnífico de los ingenieros de Technics imposible de superar hoy día. Lógicamente no tiene la calidad en cuanto a sonido de las posteriores con dbx series rs-b de gama alta pero es muy buena en su conjunto. Como punto débil a destacar es la sensibilidad que tiene a campos electromagnéticos con otros dispositivos, telefonía, wifi, etc.

Reviewed Apr 29th, 2018 by

Love this deck.......it reminds me of my old Teac A650....extremely well made..the deck's ejection/load is dampened and works very well...lots of nice features including large lighted vu meters which I like.
..Sound is fantastic...especially with Maxell XL11 C90s..even for it's age it sounds excellent to me...so I use it often for listening and recording...



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