【About the Oberheim Matrix-6】 The Matrix-6 is a legendary 6-voice analog polyphonic synthesizer that packs the powerful "Matrix Modulation" of the flagship Matrix-12 into a compact chassis. Its DCOs provide stable pitch while the complex routing capabilities produce the thick, evolving "Oberheim Sound" that remains unique in modern production environments.

🔧 Service & Condition This Oberheim Matrix-6 has been inspected and serviced in Japan by Good Mark. We focus on ensuring these vintage instruments are ready for practical use.

• All Tact Switches Replaced: Every button on the panel has been replaced with a new one. All edit functions and parameters respond smoothly with a fresh feel.
• Factory Patches Restored: The original factory sound set has been re-installed, allowing you to experience the full potential of the Matrix-6 immediately.
• Internal Backup Battery Checked: Voltage is at a healthy 3.2V, ensuring your custom patches are safely stored even when powered off.
• Memory & Edit Functions Tested: Confirmed that patches can be edited, overwritten, and stored correctly using the official manual procedure.
• Keybed & MIDI: Velocity sensitivity is responsive and MIDI In/Out is fully functional for DAW integration.
• Cleaning: All sliders and jacks have been cleaned. Interior and exterior have been lightly cleaned.
• Split Function: Internal split processing and settings are fully operational.

⚠️ Important Notice for Vintage Users (Please Read)

• Audio Output: The Matrix-6 is primarily a monaural design. While it has L/R jacks, the Right jack is a "Para-out" specifically for splitting sounds. Due to age-related internal circuitry, the Right jack is currently inactive. However, in Split mode, all sounds are mixed and output correctly via the Left/Mono jack. You can still adjust the volume balance between Upper and Lower sounds. This does not affect standard recording or performance.
• Aftertouch: The internal pressure sensor has aged and is partially functional. It generally responds in the center area of the keybed but does not respond on the right side. Note that the unit correctly receives and responds to Aftertouch data via MIDI for full expression.
• Unconfirmed: TAPE LOAD/VERIFY functions are untested.

➡️ Accessories

• Power cable (Non-original)
• Original Operation Manual (Hard copy)

⚡ Voltage100V AC (Japanese domestic model). We recommend using a quality step-down transformer in 120V/220V regions for long-term stability.

💡 Discount Hint for European & Asian Buyers For buyers in Europe and Asia, we can often provide a better price (10-15% OFF) depending on your shipping zone. Please use the [Make an Offer] button!

🚚 Shipping & Taxes

• Free Express Shipping via FedEx/UPS/DHL with tracking and insurance.
• 🇺🇸 For US Buyers: NO additional import duties at delivery! We ship via DDP (Delivered Duty Paid). We cover all import duties and handling fees. (Sales Tax collected by Reverb is separate).
• 🌎 For International Buyers (Outside US): Import duties, taxes (VAT), and customs fees are the buyer's responsibility. Please check your local customs rates before purchasing.

📦 Packaging: The unit will be securely packed with multiple layers of protection and a reinforced box.

📩 Feel free to message us with any questions. 🎹 Thank you for your interest in this classic Oberheim Matrix-6. – Good Mark