MATRIXSYNTH: Yamaha CS-80 CS80 Analog Synthesizer 1977 w/ MIDI Unison Mod

Monday, February 01, 2021

Yamaha CS-80 CS80 Analog Synthesizer 1977 w/ MIDI Unison Mod

video by Tom Jones

via this auction

"Yamaha CS-80 CS80 analog syntheisizer from the late 70's. It has been professionally refurbished and includes Kenton MIDI, Unison Mod, new CMOS, fresh calibration, PSU rebuilt, etc.

Everything on this synthesizer works perfectly as the video shows. All voices are in tune. All sliders work perfectly without noise or issues. All functions are 100%!!

The Unison Mod works by flipping the sustain switch from I to II. All voices are stacked on the same note in this position. Pressing any other key simultaneously will pull voices from the unison voice. The red button below the tune knob is for MIDI functions. The switch next to it is for switching between MIDI LFO and front panel LFO.

The Kenton MIDI install and Unison Mod were a $3000 USD job. Replacing all CMOS on the KAS and TKC boards is also a very expensive preventative maintenance job. Receipts can be furnished for these repairs..."

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