Oberheim Matrix 12

“This is a previously used Oberheim Matrix 12. The Matrix 12 comes straight from our professional recording studio and is in excellent shape. The synthesizer was recently cleaned and serviced giving it longevity and peak performance. The only cosmetic wear you will find is on the wood side paneling, most notably on the left panel; the wood is partially chipped. Overall, this Matrix 12 is in very clean condition and is a prime example of a legendary synthesizer.” Click here to visit listing on eBay

Oberheim Matrix 12 Project Machine

“Up for auction is a vintage Oberheim Matrix 12 synthesizer. Unit has a few bumps, marks, and scrapes cosmetically, and one key is broken. Functionally I have provided two links to videos below to demonstrate that the synthesizer powers up and all keys and controls function, however it does not operate correctly. My original plan was to get this instrument properly serviced and have any issues repaired, however I have found no one in my area worthy of the task. Therefore, instead of paying to ship the unit back and forth to a proper technician, I am offering it as is, just to test the waters. The tuning sometimes passes and sometimes fails but usually fails across the board. Occasionally, as demonstrated in the videos, I can get some functionality out of the default patch upon startup, but usually just garbage sounds. From my research the issue could be as simple as replacing the power cable input, which I will do if this auction ends without a sale, as the part is available and inexpensive. I am aware my opening price is high, but there is no reserve. The question is, how bad do YOU want what has been called by many the baddest analog synthesizer ever made?! This one is available and ready for you to refresh and make your own 🙂 ” Click here to visit listing on eBay

Oberheim Matrix 12

“You know what this is… This is the most advanced, most elegant sounding Oberheim of them all.. The Matrix 12. Essentially TWO Xpanders with a fantastic keybed and such an amazing piece of eye candy. She purrs… she growls and so much more. Once you play it, you’ll instantly recognize all those instant classic 80s sounds. Not many synth freaks have one.. most have never played one. This synth is not for the faint of heart. It delivers in every way.

This is the better Made in USA version, not the overseas inferior version. It was fully overhauled by a veteran analog synth tech. Recapped, tuned, new bushings, new battery, calibrated and tested over and over again to ensure years of usage to come. It sounds amazing, and it works as it should.. NO operational errors here. Plus as you can see from the pics.. it looks fantastic as well.

NOTE>>> This has the 12 output panel installed on the right side. It was installed at Oberheim way back in the day but the original owner opted to not have internal circuits installed for the 12 outs.. not sure why. You still obviously get the Left, Right and Mono outs working and sounding GREAT!

As you can see from the many pics.. ALL tests PASS fast and without issue.” Click here to visit listing on eBay

Oberheim Matrix 12

12 “Very light wear. Light scratches on wood sides and one screw missing on side panel. The unit has been sitting in it’s original box in a climate controlled setting for years and may need service. The only testing that was done is the “tune all” test, which it passed (see pictures). Selling as is, no warranty expressed or implied. No return and no refunds” Click here to visit listing on eBay

Oberheim Matrix 12

oberheim matrix 12 “Hello here I have for sale my pride and joy the legendary king of poly synths the Oberheim Matrix 12!! it is in absolutely stunning condition looks brand new for a mid 80’s classic (museum grade) please see pictures, fully operational and has had a complete service with overhaul, 12 voice analogue king, this is probably the best example you will find also has the 12 voice expansion output.” Click here to visit listing on eBay

Oberheim Matrix 12

oberheimmatrix12 “Oberheim Matrix 12 Analog Synthesizer Keyboard – Juicy VCOs, VCAs

Classic powerhouse analog synthesizer, one of the greatest ever made with incredible modulation matrix and 12 complex VCO voices (24 OSC), 15 VCAs. Velocity keyboard (not aftertouch). Tunes perfectly, every time. Memory works perfectly – custom Kid Nepro M12 sound bank included installed. Works flawlessly (aside from encoders starting to go; repair/replace kit included).

Awesome power even today: five multi-wave LFOs (each of which offered no less than 64 control waveforms), plus tracking generators, ramp generators and lag processors.

Why Selling?

Downsizing my small home studio from stuff I bought over past decade and have not used as much as I’d like. I simply have/had way too much stuff, and no longer have time to be a “collector.” Going from 37 synths/rack/keyboards down to 8 – about 60% of the stuff already sold (Sunsyn, Solaris, Waldorf, etc.).


Great shape, no big scrapes, dents, broken keys, etc. Tunes perfectly, always has. Keys and displays all work perfectly. Buttons all work, couple are a little sticky as with all of these at their age (buttons can be replaced if ever needed thanks to great aftermarket for some things like buttons and encoders).

Memory still works just fine and I’ve loaded in the Kid Nepro custom sound set for the single patches to verify that for the new owner. (Factory patches provided on the USB key and cassette.)

One of the wood pieces had a split (bottom left) and original owner repaired/glued that. I have replacement wood piece but does not match wood of right piece (see notes about that below). Many M12’s end up with a split in the wood due to taking keyboard off a stand one inevitably sets it down on the corner of one of the wood pieces, and eventually it can split from the front center screw/bolt. Most folks glue and set the piece and leave it (as the original owner did with this 10 years ago). Never bothered me since it sat on my keyboard stand the past 7 years.

As with all Matrix 12 keyboards, the encoders on the big dial knob controls start to go after a period of time/use, and I noticed a couple of these are starting to do that now finally. So, I bought the Syntaur repair kit with new encoders, which need to be installed and then they will be minty fresh. I left the buyer to install so you know 100% they are new, as anybody can say stuff is new but how would you know?

Smoke free, pet free home studio; gear never gigged, loaned, rented; never thrown around like a juggler on crack; never ever left out in the rain as part of a cake, etc. J” Click here to visit listing on eBay

Oberheim Matrix 12

used matrix 12 “Wohl der beste der je gebaut wurde: Oberheim Matrix 12. Technisch und optisch im Top Zustand. Stand immer abgedeckt in meinem Heimstudio und wurde wenig benutzt. Ich habe ihn 1993 vom Erstbesitzer gekauft. Er stand nie auf einer Bühne.

Die Speicherbatterie müsste gewechselt werden. Mit dabei sind zwei Soundspeicher Kassetten, zwei Bedienungsanleitungen, deutsch u. englisch und eine Abdeckhaube.

Das wunderbare Teil kann man nicht in ein Packet stecken und mit der Post verschicken. Deswegen nur Abholung aus Hamburg.

Da Privatverkauf, keine Rückgabe, keine Garantie

Auf vielfachen Wunsch verschicke ich den Synthi auch. Nur innerhalb Deutschlands.” Click here to visit listing on eBay

Oberheim Matrix 12

matrix-12“Up for auction a fully functional Oberheim Matrix-12 in excellent condition. Low Reserve! The rich analog sound is incredible. Here’s what ‘Vintage Synth Explorer’ has to say about this synth: Oberheim’s Matrix 12 is a legendary analog synthesizer from the mid-eighties that is still the king of analog sounds. One of the fattest, roundest, pleasantly analog synthesizers around! It’s long been known for creating some of the thickest and best analog pads, sweeps, buzzes, basses and textures. It features Matrix Modulation for extremely wild virtual patching for almost unlimited range of sounds and modulation capabilities!” Click here to visit listing on eBay

Oberheim Matrix 12

obie-12 “Up for auction, my beloved Matrix 12. Recently serviced, all voices are tuned up and it sounds amazing. It has never left my smoke free studio. It comes with it’s own custom made road case and original owner’s manual. The white tape you see on the face is the preset list of the synth. It can be easily removed, it won’t damaged the paint. This one has been babied and it looks amazing. ” Click here to visit listing on eBay