MATRIXSYNTH: Oberheim Matrix-12 Synthesizer Keyboard SN P91301

Monday, May 13, 2024

Oberheim Matrix-12 Synthesizer Keyboard SN P91301

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"Like nearly all the high end vintage analog synths we sell, this item has been METICULOUSLY disassembled, cleaned inside and out, FULLY serviced by professionals who’ve been servicing and selling vintage synths for more than the last 3 decades, and systematically tested multiple times over a long period to ensure it’s working exactly as it should. No BS. No ebay surprises. We’re perfectionists and don’t cut corners. Although this instrument came to us in relatively good shape, we want our items to be better than the rest and invested *many* hours of tech time plus parts costs to fully overhaul this unit so it would be clean, working like new again and as reliable as possible for its next owner. This was a serious investment of time, love, and money, and was definitely worth the effort and is of course reflected in the higher than usual price. If you’re looking for a great sounding example of this model that works just like it should without needing to invest hundreds or thousands of dollars in tech fees and waiting from weeks to years, this one should make you very happy.

Our tech did the following work to this unit to make it better than the rest / promote longevity:

Power supply capacitors replaced.
Battery replaced.
Patches reloaded.
Cleaned all switch contacts.
Cleaned unit inside and out.
Installed new encoders to prevent the usual glitchiness one often experiences with original 40 year old encoders (changed ceramic caps in circuit for compatibility).
Cleaned key contacts and PCB.
Cleaned sensor.
Replaced pitch and mod lever potentiometers with new ones since the originals are often problematic these days.
Multiple systematic burn in tests to ensure stability.

OS ROM 1.1, voice 1.6.

Selling fees here are over $1000, and professional servicing by perfectionists and future-proofing is costly."

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