“In good working condition.” Link
“Selling great condition Oberheim Matrix 6 keyboard. Not the rackmount version. All voices working properly, filled with 99 patches of pure analog goodness.” Link
“Matrix 6 in good used condition.
Comes with power cord.” Link
” I am the original owner of this Oberheim Matrix-1000. I bought two of these back in the day and this one mostly sat in the original box (I used the other one). This is the rarer, cream colored face that Oberheim sold late in the production run. It’s in amazing cosmetic condition considering it’s age and the only flaw I can find is a tiny dark mark on the right side of the unit on top of the cream faceplate between the screw and rack holes (see the 4th photo). This synth is over 20 years old and it’s very unlikely you can find another in this condition.
It includes the box, power cord, the original laminated patch list from Oberheim and the original manual. The cover of the manual has yellowed a little bit with age. The box is in excellent condition and includes the original styrofoam inserts and will be double boxed for shipping.” Link
“Light use in non-smoking home studio. Only owner. Unit was rack mounted and never moved.” Link
The unit appears to be working fine as I did some basic testing through MIDI, all the keys and sliders and buttons working fine to the best of my knowledge including editing patch programs.
Cosmetically its in reasonably nice condition for its age as you can see. There are some wear and scuff marks here and there with slight bend on the top panel as pictured, but nothing too major. I’m including plenty of pictures so you can see exactly how it looks.
Power Cable included.” Link
MIDI sound module
It’s a little scratched, but it’s no problem to use.
There is no problem in operation. ” Link
” I’m relisting my OB-X. For those who were watching it: I had it listed last week, but after a couple of days, I got cold feet about selling it and had retracted the listing early as I wanted to sleep over it some more in order to decide whether I really want to sell it or not and needed to come to terms that if I sell it, chances are slim to none of me ever owning an OB-X again. However, after careful thought, I’ve decided to sell it after all..(sniff). So, here it goes again:
This 8-voice OB-X powers up, but outputs only weird and static sounds and seems to freeze up on default sound upon power-up.
I purchased this OB-X last October, basically as a non-working unit, i.e. it was only outputting a ground hum type sound. I had it serviced just over a month ago in mid-December by a local tech in San Diego, CA in order to “bring it back to life” and paid $842 for it (see image of invoice). The tech identified and repaired a short, which apparently was due to corrosion from mouse urine, recapped the power supply, rebuilt/recapped the voice cards and swapped their trimmers out with the multi-turn kind, installed new key bushings and then fully calibrated it. When I picked it up from the tech, it worked. But only about 3 short days later, the synth started to freeze up, only seconds after powering it up and became stuck on the default sound, meaning it was non-responsive to any further preset key selections or attempts to edit it. When I contacted the tech 3 days later to report what was happening and to ask if he could take another look at it, he told me over the phone that this must be a new issue and likely not related to the work he’d already done on it and needed to open another ticket for it, thus incurring further repair costs. Unfortunately, I don’t have the time, money, and energy to keep this going and decided to sell it as-is. ” Link
“Oberheim DX in immaculate working condition. Recently fully serviced to ensure full functionality.” Link
Synth is 100% functional and works great.
Passes all tuning tests” Link
“This is an Oberheim Matrix 1000 pre Gibson era rackmount synth module. Unit is fully functional, the battery socket has been upgraded and battery replaced, all six voices have been tested and calibrated and are in full working order. There is some minor cosmetic damage owing to its age and some of the front panel buttons stick, but all of them work. I am including the original owners manual which is more of a reference guide. I am also including a spare CEM 3396 voice chip. This is the most commonly replaced part on these synths and are increasingly difficult to find. Also the synth’s firmware has been upgraded to Bob Greib’s 1.20 version which fixes many original bugs. ” Link
“Vintage Oberheim xPander synth. Nice cosmetic condition. I believe this unit is fully functional. I’ve used the MIDI and audio outs. And I have programmed it extensively. When I first got the unit, some of the data pots didn’t increment each time the pot clicked, but after some use they all work now. I haven’t used any of the CV outs. I don’t see why they wouldn’t work since everything else does. The unit comes with original manual and 3 backup cassettes.” Link
“Selling my Oberheim Matrix 1000 Synth. Works great and sound amazing! Power cord included. No manual but one can be downloaded form the internet.
I accept PayPal only. No international bidders please.” Link
“This is an Oberheim DMX drum machine with midi. I just picked this up from being serviced from a tech who worked at Oberheim while this was released, so no one better to service this! This condition is good, though it does show some wear with knicks and scratches to the paint. The display works perfect and the functionality is excellent, as it was just serviced. The midi plate shows some wear, just being very descriptive. Sounds amazing, a classic drum machine! ” Link
It is in good condition, and was given a given a once over by EMS Services last year (see pics) who fixed a crackling volume pot, and gave it a clean bill of health….It does hum when it is turned off (always has), but apparently this is common with these units. Case has a few small knocks and scratches commensurate with it’s age, please check photos.” Link
OB-Xa (8 Voice / 120 Programs) – Professionally serviced and overhauled (for well over $1000). Including all new J wires, bushings, NOS curtis chips, caps, gating chips, opamps, battery, pots cleaned, contacts cleaned and fully calibrated (including mod / bend section). Keybed is great and plays like new. Some scratches on top. Please see pics. All knobs and buttons are there. Sounds totally amazing! I programmed in all the factory patches.
Oberheim DX Stretch (MIDI) – Professionally serviced. Including new battery, all sliders and contacts cleaned. This is a later model with MIDI out (key to connecting this Oberheim system out to other MIDI drum machines, synths and sequencers). Excellent condition. Missing one slider top. Please see pics.
Oberheim DSX (OS 3.04) – Contacts cleaned. No further service needed. Excellent condition. Comes with original Oberheim Computer Interface cable. This sequencer is amazing! Super flexible. Compatible with numerous vintage synth / sequencer voltages via internal switches that can independently change 8 total cv / gate channels to different voltages. With this Oberheim system combination you can do cv / gate, trig, clock or w/ the DX midi out to control and incorporate basically anything. This is the only sequencer I have found that will sequence my vintage Minimoog Model D.” Link
“Fully functioning Oberheim synth. A few marks, the most significant is in the membrane panel by the “patches” button. This is purely cosmetic. I’ve loved this keyboard but am trying to pay some non musical bills at the moment. ” Link
It’s definitely used, ears are a bit bent, scratched on top from racking. But functionally everything works great.
*Edit: Added the photo with the level by the front, since my phone apparently has pretty bad lens distortion that makes the front look bent and caved in in the top down picture. It’s not the prettiest piece but it’s not totally bent out of shape!” Link
“Oberheim Matrix 6R Classic Analog Synth rack. 6 voice DCO synth. Very powerful under the hood. incredible amount of modulation options. and can also drop some bass. Unit has a few issues. Issue 1 screen sometimes works, sometimes doesnt. I can make it work by tapping on the screen/front panel. Ive been doing this for 10 years, lol. may be as simple as a connection issue, i never had enough reason to get into it and figure it out. Issue 2 = noisey fader pot on master volume. I just turn it up all the way and never touch it, all good. Issue 3 some membrane buttons need cleaning but all work. some take a little extra pressure to work. Personally i use this with a software editor so i never really have to tweak the real unit much and these issue become non issues. good chance to get a classic synth at a decent price.” Link
“I have had this fully overhauled a few years ago, it has a very fast tune up time and of course it sounds fantastic. I’ve programmed some great sounds worth keeping, it’s very lush and big sounding and crazy sounding that can be very interesting and very out if you like those Sci fi sounds from that era. It has X mod on that’s rare on synths from this time and when in unison mode thats like thunder and lighting crashing down. It has 2 VCOs, LFO with sine, square and S and H wave forms with a extra high and low pass filter.” Link
“A very well build and no longer available polyphonic analog synthesizer with modifiable 1000 presets. Pre-programed with many presets and will include a CD with many more presets that can be loaded. Tested by me, all voices are working and sounds great. ” Link
“Up for sale is this Oberheim Matrix 6!
I bought this keyboard around 5 years ago from the original owner and it is in great condition which can be seen in the pictures. I’m selling this because I don’t use it far enough and it’s a really cool synth that I’m sure someone would really enjoy.
It all works fine and is factory original.” Link
“This is an Oberheim Matrix-1000 in excellent used condition. Everything works 100% and it is in pristing cosmetic condition. I have used this synth only in my home studio on a few recordings and it sounds like gold. It is a lot of fun running through the 1000 patches and you can get lost for hours doing so (in a good way!). ” Link
“Unit is 30 years old, has normal wear, all switches work. Missing 3 switch caps but the sounds still trigger. Also missing screw from front panel.Does not have drum samples, has bass sounds instead. ” Link
“One thousand Matrix 6/6r patches in a single rack !!!, analog fat and warm pads, strings, eightys brass, and more !!!, work perfect!!, OS 1.13 (just chip installed),have interior switch for 220/110volts option; go with cable and CD with Matrix 6 library ” Link
“Manufactured in March 1989, this Oberheim Matrix-1000 single-space analog rackmount synthesizer module packs the same six-voice sound engine as Oberheim’s Matrix-6 keyboard synthesizer. It’s loaded with 1,000 beefy matrix-6 patches — 200 for user patches — and you can load additional Matrix-6 patches using system-exclusive MIDI data or a software editor/librarian.
Each of the Matrix-1000’s six voices sports two DCOs (digitally controlled analog oscillators), a lowpass filter, two VCAs, three envelope generators, two LFOs, and two ramp generators. This module works great, is in reasonable cosmetic condition, and has always been used and stored in an entirely smoke-free environment. Turning its volume knob can induce crackling into the audio signal, but the noise disappears when the knob is left alone. As you can see from the close-up photos, there’s a bit of wear and tear on the front panel, but the rack ears are straight and all of the buttons and the display work perfectly well.”
” Up for sale is an 8 voice Oberheim Obx with a 4 pole filter mod in place of the noise. It is in good condition having some tape residue left from where the logo “OBX” (on top) and “Oberheim” (back) were taped for a gig, at some point it was subjected to heat because a few of the upper octave black keys have apparently melted some. I am the second owner having bought it from a man named Virgil Weber who bought it new and used it in a Lake Tahoe show for Laura Brannigan. It also comes with an anvil case, and although the case has no padding inside, it reads the words “Obx Laura Branningan” therefore confirming the fact that it was in fact used in the show. This keyboard functions as it should and has been more stable than the OB8 I used to have! ” Link
Original Factory Programs have been reinstalled,
so you are getting the original Oberheim patches that came with the instrument
Copy of original owners manual provided” Link
“Yeah, it’s “used” but there are NO signs of cosmetic wear, because it has not been out of my studio since the day it was bought. It self-tests out perfectly and has been in a smoke-free environment at 70 degrees Fahrenheit throughout its entire life. Comes with owner’s manual & power cord. Analog sound synthesis at its finest. ” Link
Fully tested using a Kenton Pro Solo MkII to provide Gate and CV while driving a Dotcom Modular Synthesizer. Requires a minimum Gate voltage of about 8V.
All sequencer functions were tested and proved to be working as designed. A photo copy of the DS-2 user manual will be included.
Please note that the sequencer provides a Trigger output and does not sustain the notes. The amount of sustain is controlled by the sequenced synthesizer’s envelope generators using the decay and release controls. This sequencer records Keyboard CV voltages and the time between Triggers. During playback the sequence rate can be modified with the clock rate control and the pitch can be modified with three selectable transpose controls. This is a hands on type musical tool and is a lot of fun to use.
Cosmetic condition is extremely good. All control pots, switches, push buttons, push button lights and indicator lights are working. The gas discharge display is working and in fantastic condition. More pictures are available at request. ” Link
“This Oberheim CPS-1 Synthesizer Expander Module in perfect working condition. All internal and external parts are 100% original. It has a manufacture date of June 27, 1977. Cosmetically speaking, only the most minor scuffing is observable on the vertical front panel, and the sticker which read “VCA CTRL” is faded . Also, the rubber foot pads on the bottom have moved slightly, however they are still very strongly adhered. I did not want to re- position them and glue into place, rather I figured the new owner can make that decision. I am including documentation showing that it has recently been given a thorough inspection, testing, cleaning, and lubrication of pots and switches by Synthtronics Electronic Music Services in Southborough, Massachusetts. I am also including the original instruction manual, however I believe the outside cover is missing. The unit is 9 inches wide, 8.5 inches deep, and 6 inches tall at its highest point in the back, and 3 inches tall at the very front. Free shipping. ” Link
“Oberheim Matrix-1000 Synth Module.
Monophonic output. Firmware upgraded to 1.16.” Link
“Oberheim Xpander XP-1 – in excellent condition. 100% functional. All tuning passes. Nice bright displays. Cosmetically looks fantastic. Woodend pieces look great. This is the US made model. Sounds fantastic! Arguably the best analog poly every made!” Link
If you’re looking for one of these I don’t need to put in much description. I’ll put some in below but you should look up reviews on line. Just know that this has served me well over the years. There are some scratches but it works great. You can’t buy these types of sounds any more. It was mainly used in my studio and I’ve moved to a computer based system due to size so the racks have to go.
It has great pads, strings, bass, and lead sounds. ” Link
“The top has scratches but this unit has been tested and works great!” Link