Oberheim Matrix 6

“Very nice condition. All the keys and buttons work. Please see pictures.This is the USA Model that runs on 120v 60hz. I took a closeup picture of one white key that was cracked but it was repaired professionally by the previous owner. The patches sound amazing! This has beautiful upgraded ends crafted from exotic wood from Chile. One corner has a small ding but that is the way the ends came to me from the guy in Chile. I still have the original ends if you are interested.” Click here to visit listing on eBay

Marion Systems MSR-2

” Marion Systems MSR-2 16 Voice Analog Synthesizer
This MSR-2 has Two Analog Synth Modules and was customized by Marion Systems

This auction is for one of the most powerful 1 unit
analog synthesizers ever made. 16 true Analog Voices
Two MIDI inputs can route to either or both ASM module and two audio inputs
allow direct mixing with internal mixer. Also, the 25 pin connector on each
module allows you to input 8 mono inputs to the 8 VCF’s of each module.
Full MIDI implementation with velocity and aftertouch

This MSR-2 comes with Original Manual and Original Power Supply
Main unit 1.09 O.S. and 1.13 O.S. for each of the two ASM modules

I have owned this MSR-2 for 25 years and it has never left my
smoke free climate controlled studio.
There is no rust, corrosion, or dirt. see inside pics
A new Energizer battery was installed 3 years ago so should be good
for another 15-20 years, but back up your stuff if you create great sounds.

Customized by Tom Oberheim and Marion Systems
In 1998 I sent the unit back to Marion Systems for an upgrade.
They added a second Analog Synth Module (ASM) and upgraded the O.S.
I was working as a tech at E-mu Systems and Tom Oberheim called me
at work and we talked about my love for all synths Oberheim. He told me
he could disable the EQ in the MSR-2 and get an addition al 3 DB of gain.
I told him that would be great, they removed EQ, and the volume gain is significant.
Tom was really nice and it was an honor, as an EE myself, to talk to him.

So yes this is a customized MSR-2 by Tom Oberheim and his Marion Techs.
The EQ section screen is still there in software, but has no effect since disabled
The result is a louder synthesizer” Click here to visit listing on eBay

Oberheim DSX

“Oberheim DSX Digital Polyphonic Sequencer.

Light scratches on top surface and some dents to wood. Powers up. Buttons appear to work. Am happy to test if you can direct me on how to do so.

Vintage equipment and sold as-is. Get all your questions out of the way before you purchase.” Click here to visit listing on eBay

Oberheim Xpander

” Oberheim Xpander Analog Synthesizer
100% Working, Great Cosmetics.

This Oberheim Xpander is a monster synthesizer and is in great shape.
The battery was replaced and unit checked 2 years ago by Synth Smith,
a great tech who worked for Sequential and E-mu Systems.
The last battery lasted over 20 years so should be good for many
years, but back up your sounds.
TUNE ALL returns all passing as shown in pictures
Video below shows a simple test of features and ends with running the tuning process
Main processor O.S. 1.2, and Voice processor O.S. 1.4 (latest O.S.)
Amazing Condition, The only real scratches are on the bottom of the synth
No rust or corrosion as shown in pictures of inside this beauty
The three displays are nice and bright

Auction Includes these Items
1 -Vintage Oberheim Xpander in full working condition
2 -Oberheim Xpander Original Manual
3 -Custom sounds installed. A mix of the Kid Nepro Matrix12/Xpander sounds from Rogue
music, and some of my own creations.
4 -A 3 year old Roadie Xpander flight case in mint condition
5 -Also, comes with a survival kit of five rare chips.
Three CEM 3374 VCO Chips
Two CEM 3372 VCF Chips
6 -And lastly, a dust cover so it stays nice and clean” Click here to visit listing on eBay

Oberheim OB-X

“Here’s the one you’ve been waiting for! This 8-voice Oberheim OB-X sounds amazingly fat and warm and is ready to find a good home. This synth has just been extensively serviced by Synthchaser in March 2022 with:

Power supply rebuild – new capacitors, trimmers, upgraded bridge rectifiers
All tantalum capacitors replaced – All failure prone tantalum capacitors replaced throughout the entire synth
Voice cards serviced – All polarized capacitors and trimmers replaced, voice cards calibrated
Keybed refurbished – new bushings, keys ultrasonically cleaned, bus bars and j-wires cleaned and adjusted
Many connectors replaced
Factory patches loaded

There are a fair amount of scratches on the paint–see photos for details. This is the final revision of OB-X which includes the Oberheim Computer Interface for connecting a DSX sequencer. All voice cards are original, no counterfeit or clone cards are in this synth.” Click here to visit listing on eBay

Oberheim OB-Xa

“I am the 2nd owner of this. I have had it for 20 years, never gigged, just home use. All caps replaced years ago. Midi added. There was some feature put in by the original owner that I removed so there’s a small row of plugged screw holes on the top left of the unit.

I had the anvil case made. It looks near perfect with only a couple of small scratches to the top of the case. Working well, awesome sound. Programs fine. No problems to speak of. ZERO corrosion or paint chipping. This one is probably the cleanest one available right now. I never used the MIDI and cannot say if it works or not, cause I don’t know. Local pickup available in Oceano, CA. next to Pismo Beach.”
Click here to visit listing on eBay

Oberheim Matrix 1000

“Oberheim MATRIX-1000 6 voice synthesizer

Looks 9.5 of 10
In very clan condition. Please see pictures.

Works 10 of 10
Everything works as specified, overhauled before shipping to have long life and to keep original sounds.

Work list (Excerpt) :

Change all elec. caps and power regulators with new ones.
knobs, switches and jacks cleaning.
New memory backup battery installed
3rd party ROM installed on request, please point revision.
Adjustment.” Click here to visit listing on eBay

Oberheim OB-12

“I have here a Oberheim OB-12 Working great with case, LCD screen is bright and readable (no dead pixels) comes with manul.
I will ship to lower 48 states only.

If you wish to buy from a further destination, please contact me and I can look into shipping prices with you.

Board like I say seems to work great, I have had no problems whatsoever, however I am also not a professional keyboardist. And so for me, I never got out of its full potential and it is time for me to move on.” Click here to visit listing on eBay

Oberheim Matrix-6R

“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

Oberheim Matrix 6R

“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

Oberheim OB-X

“Vintage Oberheim OB-X 8-Voice Synthesizer from 1979 with Encore Midi Retrofit – in excellent original condition.

This Oberheim OB-X is a 61 key, polyphonic analog synthesizer, featuring dual oscillators (with sync and FM), noise generator, resonant 12dB low pass filter, dual ADSR envelopes, an LFO, 32 presets, tape interface, and CV IO.

I’m a composer for TV, film and video games and I’ve used this OB-X extensively since I bought it the ’90s…sadly I don’t use it like I use to and it’s time to pass it along to someone that will love it as much as I have over the years. I remember searching long and hard before I found this particular OB-X, I believe I’m the second owner…the first owner took exception care of it before I got it.

This OB-X is most likely a Rev1 built in 1979. Over the years I’ve seen folks replacing caps, resisters, mini trim pots, etc. on their vintage synths and whoever buys this OB-X may choose to do the same – but it still has all the original electronic parts and components and works great for me and sounds incredible! I’ve done two mods since I bought it, the Encore Midi Retrofit was installed back in the ’90s and I replaced the memory backup battery a few years ago. The only thing not working is the led on the Noise “Half” Button selector that doesn’t light up when turned on, it was like that when I bought it.

The Autotune works great, especially after the synth has warmed up for about 30 minutes. The original eight voice cards are in tune all across the keyboard and sound big and fat – but if you want them all in pitch perfect tuning you could have a true synth technician/specialist to do a calibration-tuning on the all eight cards/voices. To me, a slight variance in pitch on the collective eight voices is how I remember these synths sounding from the 80s:)

I’ve kept it in my smoke free studio ever since I bought it in the ’90s with a cover when not being used. The keyboard is really clean and great looking. The letters and screening are exceptionally bright and sharp. There are marks on the bottom, that’s the way I got it (see photos) and a few small scratches on the external metal casing. The side panels are in great condition (not real wood but they look fantastic). Some of the screws look like they might have been replaced but they all look like what I think the original screws look like. The keyboard is in excellent shape, and all keys feel in great shape and work well with no glitching.” Click here to visit listing on eBay

Oberheim Matrix 6R

“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 1000

“Here is a USA made Oberheim Matrix 1000 single space rack mount analog MIDI sound module in very good condition. There is minor body wear on the module. There are 1000 analog sounds in this module. The Matrix 1000 is a 6 voice, 1U 19″ rack analog synth that has 200 programmable sounds (000-199) and 800 preset sounds (200-999). Serial number is L9B0928.” Click here to visit listing on eBay

Oberheim Matrix 6

“This 1986 Matrix 6 is in superb condition! Purchased from Switched On in Austin, TX over the summer. Techs there replaced the LCD, internal battery and updated the IOS & reinitialized the presets 🙂 all keys and membranes work great. selling because i recently moved and no longer have the space.

It does have a minor issue… the right output is VERY quiet. Most likely a 50$ fix.. teks at switched on explained it most likely got jostled loose during shipping.

– 100% positive feedback buy with confidence! 🙂

– fast & free shipping!” Click here to visit listing on eBay

Oberheim OB-8

“In Generally good to very good condition for its age (1983). Some blemishes on the finish of the top and back. The largest blemish is on the side of the case where the MIDI retrofit was installed. Not sure what happened with the wood around the opening. It happened long before it fell into my hands.”
Click here to visit listing on eBay