MATRIXSYNTH: Korg Mono/Poly synthesizer SN 373830


Friday, November 28, 2025

Korg Mono/Poly synthesizer SN 373830

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via this eBay listing

Additional Tone Tweakers Listings

"This unit was meticulously refurbished over approximately 16 hours, resulting in an instrument that works better than the rest...and is justifiably pricier, but is ready to use professionally. The person who sold us this unit said it was working fine, but in reality, it had several significant problems and needed a full and costly overhaul, including a $200 part (and others).

37383x

Here's a list of some of the work we did to this unit:

Cleaned unit inside and out.

Rebuilt power supply (replaced electrolytic capacitors) (future-proofing measure)
Replaced all electrolytic capacitors throughout unit (future-proofing measure)
Recalibrated. All ok.
Cleaned all potentiometers.
Cleaned all switches.
Cleaned all key contacts.

If you have one of these you’d like properly restored, we can help!"

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