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Technics RS-858

8-Track Cartridge Deck (1974)

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Technics RS-858


Type: 2-head, single deck

Track System: 8-track, 2-channel stereo

Tape Speed: 9.5 cm/s

Heads: 1 x record/playback, 1 x erase

Motor: electronic speed control motor

Frequency Response: 30Hz to 15kHz

Input: 45mV (line), 0.15mV (mic)

Output: 0.8V (line)

Dimensions: 21-1/8 x 4-3/4 x 11-1/4 inches

Weight: 20.75lbs

Year: 1974



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Reviewed Aug 07th, 2016 by RTM

I found one of these in the early '90's in a GW store. ($10.00)
I've owned several other recorder players (Akai, Sharp and Pioneer-the last of which is my usual favorite) and THIS quad player is the most High Fidelity of any that I've owned. (Followed closely by any one of several Pioneers, but obviously-since these did NOT have a lot of high fidelity ambition applied to them-end user cost of entry was always a factor to the marketplace of the time) It comes very close to equaling the RECORD/PB quality of decent 3.75ips two head RTR's. Faint praise to some, but better than most people might remember. Of course all the mechanical (kuh-klunk) issues are there, but what's not is the intrusive hiss , wow, flutter and poor alignment crosstalk issues. You will have to clean, align and re-calibrate the motor (a major pain as the speed adjustment is on the motor shaft itself) to get the best out of them. The 10/10 score is relative to the rest of the format. It won't go toe to toe with a good consumer/semi-pro or professional RTR or late generation Cassette machine. But they speak better for the format (with a good tape) than most folks might like to admit. Worth having for its being the best of its format/conversation piece value.



re: RS-858 | motor mounts

I replaced deteriorated motor mounts with common rubber electrical grommets ($ 0.33 each). They fit perfectly and elastic characteristics provided adequate isolation while maintaining alignment. Alternately, Keystone offers 700 series anti-vibration grommets with screws for those seeking a more specialized component. Technics created a well built machine with substantial features, which has stood the test of time superbly. For those seeking a robust 8-track recorder, this is a great component.

re: RS-858 | motor mounts

Where can I purchase the (3) Rubber Grommets & (3)
Rubber Spacers? They are for my Technics Model Number (RS-858DUS) 2/4 Channel 8 Track the information I got off the Service Manual for the Technics (RS-858US, RS-858DUS)

Rubber Grommet or called Rubber Cushion (QBG1349)
Reference Number (M54-2). (3-OF)

Rubber Spacer (QMP1418)
Reference Number (M54-1). (3-Of)

The Tapping Screw size that goes through the Rubber Grommets & Rubber Spacers is (3 x 14).


re: RS-858

I forgot to add that there are apparently a NUMBER of different iterations of this machine. I believe I have the last. (With FF and NR.) There were also variations with regard to the color of the meter lights. (Blue or Green.) There is a quadraphonic forum where these differences have been thoroughly investigated. Those forums are an interesting read.....

dgoulet's picture

re: RS-858

This model is Quadraphonic so it can be use in 2 or 4 channel
I have one and it is very high quality build, excellent sound if you like 8 track

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