“Hi friends and gear junkies. We have an Oberheim Mateix 6R. Great 80’s rack synthesizer. Hard to beat the sound of an obi. Add a little reverb on top of these sounds and you’ve got 80’s perfection! Unit functions perfectly. Volume fader failed on the front and was removed. It hasn’t effected anything use wise for me. I’ve used it in my studio setting and never had any volume issues. These are starting to become hard to find.” Click here to search for synths on eBay
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” Perfect working condition. Warm vintage Oberheim tone. Looks mint. Lots of decent presets. Includes power cable. Can be controlled with a MIDI controller or editor.”
“Oberheim Matrix-6R in great condition. I bought this from the original owner in 1997. Has the original box and manual. The only flaws are some small scratches on the bottom and rack ears and a little indent on the SPLITS button. All buttons and functions works.Has software version 2.13. ”
“Unit is working. One output on back does not work but I always used the headphone jack to record and it sounds great.
“Being sold AS IS. Item was dropped in transit and no longer works. No sound comes out. Should only be purchased if you intend to use it for parts or to repair it. There are no returns on items that are sold AS IS. See pictures for details.”
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“In very good condition, works perfect, has the firmware chip with version 2.15 direct from Bob Grieb.” 
“I’m selling my Oberheim Matrix 6R analog rack mount synthesizer. Everything works and it sounds great.
“Pre-owned Oberheim Matrix-6R Analog Synthesizer” 
“This Matrix 6R is great, I hate to part with it. Compared to any new Dave Smith Instrument this blows them away in my opinion in terms of fatness and tone. They really don’t make them like they used to. Get that creamy Oberheim sound on a budget with this highly underrated synth. This has lived happily in my smoke free studio, aside from some rack rash and a slight knick here and there its a great rack synth and won’t disappoint.”
“Selling a used Oberheim Matrix 6R. Has been stored in a smoke free studio. Still sounds great! Power cable included. “
“Very Good condition.
“Unit looks to be in great condition, powers up and shows a clear display, unit was opened up to visually inspect and looks just as good inside also!
“front perfect,works perfect, top has tape on it you can remove it but when racked you won’t see it,comes with manual,power cord,and 2 pre set sound cassettes,well cared for, hardly used.”
“Oberheim Matrix 6R, Vintage 1980ies 6-voice polyphonic analog Synthesizer..in excellent physical and working condition! ”
“Oberheim Matrix 6R rack mount synth.
“Oberheim Matrix 6R rack mount synth.
“For sale is an Oberheim Matrix 6R from my personal collection, owned for many years. Hardly used and kept in smoke free home studio. Fully functional. It’s in good shape, it does show some signs of wear as expected for its age. The only issue worth mentioning is its missing the cap for the slider shaft, but the slider is still there in tact and working as it should. Check out the pictures to make sure you like it.” 
“Classic rack mount version of the Matrix 6 synth. 6 voices of Oberheim analogue 80’s goodness. There is one small segment of LED on the far right which does not light up, otherwise it’s working perfectly and sounds fantastic. It can run on either 120v or 240v by swapping a fuse (it is currently set to 240v). Happy to pack well and post.”