Yamaha CS-70m

Yamaha CS-70m Image

The CS70m is a great big powerful polyphonic analog synthesizer which belongs to Yamaha's excellent line of CS series synthesizers. Fat sounds, cutting leads and bubbly basses, the CS70m has 6 voices of polyphony each supported by 2 oscillators for a total of 12 analog VCO's! It's got very flexible LFO, envelope and filter controls all of which sound really nice and smooth. The VCF (filter) has its own independent envelope control as well.

Yamaha CS-70m Image

Truly a lush sounding instrument that would please anyone looking for that J.M. Jarre or Tangerine Dream sound. Other features include a 4 track polyphonic sequencer, a 5 octave keyboard with aftertouch sensitivity and external magnetic data card memory storage. With only a slim 30 preset sounds that are mediocre, this is the kind of synthesizer that begs you to grab its knobs and start editing (that could possibly explain its big flashy knobs and buttons).

Yamaha CS-70m Image

All in all an excellent and large synthesizer that will make any synthesist happy! It has been used by Kajagoogoo. The next step up from this synth is Yamaha's CS-80 which is an eight voice monstrous beast quite similar to the CS70m. The CS70m is likely to be too large for anything more than studio use but if you can find one it is definitely worth a listen!

Lookup Yamaha CS-70m Prices

The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

Related forum topics


Are you looking to buy or sell a Yamaha CS-70m? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

24 Visitor comments
November 2, 2013 @ 2:28 pm
You can hear the CS-70 on The Surftones album CfA2...
Hobo Bob
May 14, 2013 @ 12:43 pm
James: Same circuits as in the old CS series? ? no, not at all... not by a mile.
James Lara
May 13, 2013 @ 6:20 am
to øø-ææ

Sir you'd better stop writing bull [beep] . cs70 uses the same components that cs80-60-50 does, and sounds pretty same amazing. And cs20 and 40 are trully sounds thin and dull. But CS70 is a monster, and you can listen to the demos, ofcoarse if you do believe your ears.
April 17, 2013 @ 5:31 pm
And once you have stored a program in one of the few memories, you can never edit it again. In anyway what so ever. Now I hope you who talk about 'the best poly synth of all time' might see that it's absolutely not.
April 17, 2013 @ 5:25 pm
The sound were so thin that they designed a sine wave to go straight to the VCA to be mixed in for added voulme to the sound. Also it's not based on the amazing amount of components used in the old CS series (80-50). They cut corners in the M series and used many integrated components. The result was bad sound.
VSE Rating


User Rating

Rated 3.98 (388 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - 6 voices
  • Oscillators - 12 VCO's (2 per voice)
  • LFO - 2 LFO's (1 is programmable)
  • Filter - 12 VCF's (2 per voice, 12dB each) with envelope generator
  • VCA - 12 VCA's (2 per voice)
  • Keyboard - 61 keys with aftertouch
  • Memory - 30 voice memory
  • Control - None
  • Date Produced - 1981-84
  • Resources & Credits
  • Images from

    Info submitted by Udo Peters.

Errors or Corrections? Send them here.