"Oberheim Matrix-6R 6-Voice Polyphonic Synthesizer Firmware 2.15"

***A demo video is available on YouTube — please check it out.
Controlled via SysEx using a Kiwitechnics Patch Editor.

Condition:
• Recently serviced on April 22, 2026 — fully functional and working perfectly.
• Recapped all electrolytic capacitors with high-quality Japanese ones.
• Firmware upgraded from version 2.13 to 2.15. This update enables smooth, latency-free control with devices such as Stereoping and the Kiwitechnics Patch Editor. With version 2.13, there is about a 1-second lag when operating controls due to lower processing performance, making it less responsive.
• Backup battery has been replaced with a new one and upgraded to a socket type for easy future replacement.
• Replaced all tact switches.
• All out put jacks cleaned.
• Fully calibrated to factory specifications.
• 100V unit — a step-down transformer may be required depending on your country.

Note:
Recently, it has become increasingly common to see Japanese 100V equipment advertised as being suitable for 110V or 117V operation. While the unit may appear to work normally, using a 100V device above its rated voltage can place unnecessary stress on internal components and may shorten the lifespan of the equipment. For long-term reliability, I recommend using the unit at its specified voltage.

Shipping:
• Ships with tracking for safe and secure delivery.