Matrix 6R

“For sale is an Oberheim Matrix 6R, the rackmount version of the Matrix-6, known for its rich analog tone and deep programming capabilities. This 6-voice polyphonic synthesizer features dual DCOs per voice, classic Oberheim filters, and an extensive modulation matrix, allowing for highly flexible and evolving sound design. It’s also velocity and aftertouch-sensitive, making it a great choice for expressive playing.

Key Features:

•6-voice polyphony with 2 DCOs per voice
•Analog low-pass filter (CEM 3379) for warm, vintage character
•Extensive modulation matrix for deep sound sculpting
•Velocity and aftertouch-responsive for dynamic expression
•MIDI integration for seamless connection with modern setups
•2U rackmount design – compact yet powerful

In excellent working condition. It has some minor cosmetic wear from use over the years but nothing that affects performance.

A fantastic choice for anyone looking for classic Oberheim sound in a rack-friendly format.” Click here to visit listing on eBay

“This unit is in good physical condition. It shows some general wear from use and age like some marks. Please see all photos for further details.

• Come with power cable.” Click here to visit listing on eBay

“Oberheim Matrix-6R 6-Voice Polyphonic Synthesizer”

Condition:

• Tested fully functional.

• This unit is in good physical condition. It shows some general wear from use and age like some marks. Please see all photos for further details.

• Come with power cable.

• This unit is 100V. You may need a step down transformer depending on your country.” Click here to visit listing on eBay

“Condition: Good – shows only minor signs of wear. Some light “rack rash” on top corners from being mounted previously (see photos)” Click here to visit listing on eBay

“Oberheim Matrix 6R – Rack Mount – 6 Voice MIDI Polysynth Synthesizer. Unit works great and is in overall very nice condition. Missing the column control cap and scratches on the top. Super clean inside and out! Comes with power cord. Please check pictures for condition. Price includes Free Shipping.” Click here to visit listing on eBay

“Up for auction is this Oberheim Matrix 6R – Rack Mount – 6 Voice MIDI Polysynth Synthesizer. Unit works great and is in overall very nice condition. Super clean inside and out! Comes with power cord.” Click here to visit listing on eBay

“Bought this a few years ago, upgraded the OS, and had a tech service it last year to ensure all is well. Case shows signs of obvious wear but all membrane buttons and output jacks work. Sold as working– I simply have too many synths and want this to find a good home. ” Click here to visit listing on eBay

“Bought this a few years ago, upgraded the OS, and had a tech service it last year to ensure all is well. Case shows signs of obvious wear but all membrane buttons and output jacks work. Sold as working– I simply have too many synths and want this to find a good home. ” Click here to visit listing on eBay

“This rackmount Matrix-6 is in very good condition, with only a few of the scratches and scuffs that typically comes from use in a rack.

The unit is in good working order, and has been upgraded to the custom 2.15 Firmware, which will allow for steady control of the unit from a DAW/Standalone Software when coupled with a Matrix-6 software editor.” Click here to visit listing on eBay

“For sale an Oberheim Matrix 6r, the rack module version of the iconic Matrix 6.
The unit is 100% working and in great cosmetic condition all tactile buttons were replaced recently, if you want to add a unique piece of equipment and a beautiul sounding analogue polysynth to your arsenal tools, this is your chance!
Do not miss out on this opportunity to own a piece of music history.”
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“Classic 6-voice, analog synth from the 1980’s with the sound legacy of the renowned Matrix 12. It is an analog synthesizer that delivers warm and rich tones that are perfect for any genre of music.

This unit is in decent cosmetic condition with a few Knicks and scratches from 4 decades of use. Please refer to the many photos of a couple particular spots. I upgraded the rack ears as they were missing when I bought it. I upgraded the battery as well. A power cable is included. It is in fully-functional operational and sonic condition.

I love the sound but just have too many synths at this point, so it’s time to pass it along to another analog polysynth fan. I hope you enjoy it!” Click here to visit listing on eBay

“Fully serviced by professionals and working great! The synth engine inside this unit is the same as that inside a Matrix-1000, however, you can use the front panel controls on this unit to edit sounds. The M6r also has a split mode where you can use two different sounds at the same time.

This unit worked fine when we got it, but we paid our tech to take the following preventative measures anyway so that hopefully they will outlast all others:

Power supply electrolytic capacitors replaced.
Removed old battery, installed new battery holder and battery.
Recalibrated.
Burn in test, all tests passed.

The work we did to this unit is valuable and we are a proper reputable business, so no, we won’t price match with lesser examples or amateur sellers – you get what you pay for.” Click here to visit listing on eBay

“OBERHEIM MATRIX-6R VINTAGE MIDI 6 VOICE RACK MOUNT SYNTHESIZER MANUAL CABLES

Excellent condition

Fully tested

Includes IEC power cable

Includes original manual

Includes MIDI cable

I am the second owner of this unit

Always stored inside in climate controlled smoke free studio environment

No road use

I hate to see this one go

If you are looking at this, it is likely that you know the deal. This is a classic vintage hybrid synth. Massively fat sounds. Killer bass. Fat analog strings. Extensive routing.

The Oberheim Matrix-6R is a 3U rack and in excellent condition with very minor rack blemishes on top and bottom of case Small scratches on mounting bracket holes. Unit is operationally perfect. Always stored in a climate controlled smoke free studio.” Click here to visit listing on eBay

“Very nice”
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“Works great and sounds great. These Matrix racks sound a lot better than a lot of modern synthesizers. It comes from a smoke free home. It is being sold as is, it still has the original battery, the next owner should change it. It also still has the original presets. Lots of modulation capabilities. Really easy to edit patches from the front panel. FREE shipping for the USA only. Checkout my other listings ”
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“Oberheim Matrix 6R – Rack Mount – 6 Voice MIDI Polysynth.
Works, in good condition.
There are scratches on the chassis, nothing marring the top overlay.

I never updated the firmware of this model, which your welcome to do if you want.
Comes with the Power Cord and the original manual c1987 (the spiral binder is gone so the pages are loose and missing pages 75-78 and 81-126, the 2 fold outs are still in there, but there is no back cover.)

Bonus Manual: Oberheim MATRIX-6 Getting the most out of yours by Jeff Burger c1987 (spiral bound, 102 pages)” Click here to visit listing on eBay

“Up for sale is a single owner, excellent condition Oberheim Matrix 6R.

This unit has been in a temperature controlled environment it’s whole life….never stored . The unit was initially rack mounted and as you can see is pretty much scratch and dent free. I don’t think you’ll find one in better condition.” Click here to visit listing on eBay

“Oberheim Matrix 6R

Includes the excellent Tauntek 2.15 Upgrade

Reprinted Manual

Rack mount ears

4 soft stick pads for desk top use” Click here to visit listing on eBay

” This is a classic Oberheim Matrix 6R synthesizer, the rackmount version of the Oberheim Matrix 6. 6 fat voices, fully operation VFD display, full battery (tested at 3.29 volts), and updated firmware (2.15). It’s all good to go. Just get the sysex files and go.”
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” One of my favorite “toys” of all time! The sounds from this unit have a spacey, glassy quality that are hard to find anywhere else. Lightly used in a home studio and stored in a cool, dry environment. Comes with power cable and original manual.”
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“I have for sale my Oberheim Matrix 6R Rack Mount Polyphonic Synth Serial #KGB4919 from the original owner.
This product was purchased in the US and will ship from our studios in CT.
 
Considering how old these are I would put this in the “excellent” category, however it does have the usual amount of scratches on the top and bottom from other rack gear being installed and removed. There are some minor scuffs and specs on the front but please check the photos to 1) see if you can notice them and 2) make note if they bother you. 
Otherwise, it works perfectly. I recently sold my mint condition OB-XA so I have a good handle on Oberheim products, so feel free to ask any specific questions or you can download the manuals from various sites as well.”
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“Oberheim Matrix 6R Rackmount Synthesizer in good working condition. Great fat rackmount synth.”
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“This is a great collector’s piece! It’s in awesome cosmetic condition with minimal scratches on the metal body! Please zoom into the pictures and see it for yourself!

This unit sounds awesome, all functions work normal.

It has been recently serviced with an updated OS ROM chip [for better midi response] and a brand new high quality save battery.

This listing includes the original instruction manual as well as the original patch cassette that was manufactured by Oberheim (also in great condition!).” Click here to visit listing on eBay

“Oberheim Matrix 6R Analoger Vintage Synthesizer Rack Version aus Nichtraucherhaushalt und nur im Hausgebrauch verwendet, leicht Kratzspuren an Ober- und Unterseite dur Rackeinbau, vom Musikhaus geprüft und als technisch einwandfrei und funktionsfähig befunden.” Click here to visit listing on eBay

“Oberheim MATRIX 6R Rack Mount Analog Synthesizer Module – Tested *

includes unit as shown
does not have a power cord, used another to test
has some wear and scratching on case
screen and all buttons seem to work” Click here to visit listing on eBay

“Oberheim Matrix 6R Polyphonic Analogue Rack Synthesizer Works Great.” Click here to visit listing on eBay

“Here is a vintage OBERHEIM MATRIX-6R in very good condition. Everything works correctly. Includes owner’s manual, programming guide, and original factory sound set on cassette.” Click here to visit listing on eBay

“Oberheim Matrix 6R Polyphonic Analogue Rack Synthesizer Works Great.”
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“Seller states good working order.” Click here to visit listing on eBay

“This unit went has been sitting in my studio rack, used very little since 2003. After recently taking it out for testing, here is what I found. The unit powers up just fine. Midi signals are received just fine. Sounds are great. Audio output at the rear 1/4 inch output jacks is only present at the LEFT/MONO jack. Headphone out jack works normally both left and right. No issues with switches. The front panel is in very nice cosmetic condition, but the sides have some surface stratches from being pulled in and out of racks(all pictures are of the actual unit). Made in Japan. USA Only shipping. Unit and power cable only. No manual included.” Click here to visit listing on eBay

“Classic 1980’s analog sound
For sale by original owner ( a factory programmer for the Matrix 1000 program library)
Includes : power cable , rackmount “ears” + screws, programmable step pedal

Fully functional.
3U Rack-mount
All 6 voices fully-functional and free of defects
All membrane switches fully-functional
All front panel LED segments fully-functional” Click here to visit listing on eBay

“Here is a vintage OBERHEIM MATRIX-6R in very good condition. Everything works correctly. Includes owner’s manual, programming guide, and original factory sound set on cassette.” Click here to visit listing on eBay

“Undeniable, unbeatable, classic Oberheim sounds! The real-deal analog sound powered by a digital architecture and membrane buttons for programming.

CONDITION: Very, very clean condition for its age (1986) and fully functional with zero issues. Regarding cosmetics of the unit, there is a slight divot on the “4” button along with the typical, slight rack rash along the top rim of the unit that is to be expected from being mounted and unmounted within racks over the years.

NOTE: A custom-machined pair of 3U rack ears WILL BE INCLUDED as part of the sale.” Click here to visit listing on eBay

“Oberheim Matrix 6R.

120v version, can sell with 240v to 120v stepdown.” Click here to visit listing on eBay