“Oberheim OB-X 1979 in 1980s chassis – 1979 original chassis included
Non-midi
Great condition – recapped power supply
8 voice cards (7 working – 1 worked until very recently – probably needs cap replacement)
Keybed rebuilt but could use some adjustment / cleaning.
Plays great after 15min warm-up” Link
“This is a very very rare synthesizer in excellent working condition. It is a museum piece.
It is a 6 voice Oberheim OB-X. It has the famous JL Cooper designed and manufactured modifications on all 6 voice boards.
It was serviced and repaired by JL, a former Oberheim employee who was their number one technician. I received it back from JL about 1.5 years ago. It has been used only three days since then.” Link
”
This OB-X is in near perfect condition. It has NOT been in a storage unit and shows NO signs of rust
(tip: always look at the rear screws and jack washers for signs of rust on old synths)
It has been in the Mad Science Lab for 16 years and used by the group Silicon Breakdown on many songs. The second photo on this page shows the studio where it’s home has been. (http://www.siliconbreakdown.com/madscience.html)
I bought the OB-X from the Starving Musician store in San Jose in 1996. The tag on the back says 8 voice, but it is a 4 voice, I assumed they used the other voice cards to fix other Oberheims. Check out sound examples to see how fat 4 voices can be.
The wood panels and screws and jacks are all original, yet they look almost new. It has never left the studio except to be tuned. The front panel graphics are perfect. The tech mentioned the D key near the word Programmer had been repaired at some point, but the key plays, it is just goes down about 1/8th of inch less then the other keys and feels more squishy then the other keys. It is not visible till you know it’s there, and it’s not visible in these pictures. I did not know about the key until he tore the keyboard apart to replace the key bushings. There is one large scratch on the back of the unit near the MIDI jack, which is clearly visible in the pictures.
MIDI
This OB-X has the Encore Electronics MIDI kit installed.
http://www.encoreelectronics.com/cont_obxmk.html
This kit allows for MIDI notes as well as midi control of the filter cutoff, resonance and many other controls. It also increases the patch storage from just 32 to 120. And you can save the presets over MIDI so no more messing with tapes. I had the Kenton MIDI kit initially but the Encore Electronics kit is much better. The Oberheim OB-X never had MIDI when produced, and you do not want to deal with a special sequencer DSX hookup to control an OB-X. You need MIDI so you can control the OB-X from a computer sequencer, or a midi keyboard that has controllers to route to the many MIDI controllers on the OB-X Encore kit.” Link
“This listing is for a Oberheim OB-X.
The unit is in excellent cosmetic and 100% operational condition.
It was just fully serviced, calibrated, cleaned and tuned.
The item will be professionally packed and shipped.” Link
“Zum Verkauf kommt hier ein seltener Oberheim OBX 6 Voice
Der Oberheim OBX zählt wohl zu den interessantesten Synthesizern der Firma Oberheim.
Der Sound des OBX ist sehr warm, breit und organisch, ähnlich dem Oberheim SEM System.
Das zum Verkauf stehende Instrument wurde vom Vorbesitzer überholt und viele der typischen Oberheim OBX Krankheiten (instabiles Tuning etc.) wurden behoben.
Die meisten der alten Kondensatoren, Trimmer und Molex Steckern wurden getauscht und überarbeitet.
Weiter wurde auch ein Encore Midi Upgrade (In, Out, Thru) installiert. Dieses Kit ist nicht mehr vom Hersteller erhältlich.
Der Synthesizer befindet sich in einem guten Zustand, technisch absolut einwandfrei. Bitte beachten Sie die Bilder unten.
Lediglich an den seitlichen Holzleisten sind leichte, altersbedingte Gebrauchsspuren zu finden.
Einziges Manko: Der Pitchbender hat einen “Dead-Spot”, ein Problem, welches gerne bei frühen OBX auftaucht.
Da dies ein Verkauf im Kundenauftrag ist können wir keine reguläre Gewährleistung geben.
Das Gerät ist auf Betrieb mit 220V ausgelegt.
Der OBX wird gut verpackt und wird inklusive einem Kaltgerätekabel geliefert.” Auction ended. Click here to browse on eBay.
“Originally a 6 voice but over the years I added the extra 2 voices. It was also recently tuned up by Technician Larry who gave it a clean bill of health. Not only is this thing in great functional shape but it is in pretty awesome cosmetic shape as well. I would give it an 8 out of 10 since there’s typical rash on the bottom and few very minor nicks. Most of my friends flip-out when they see it being so clean, but remember it isn’t perfect but you will not be disappointed. I tend to under-grade my items so everyone is happy without misrepresenting. Nothing is worst than buying something broken and/or misrepresented.
It comes with a flight case but the foam has disintegrated over the years so I removed it. There’s still residue but the buyer will have to have it refoamed. The synth will be packed well inside the case and then boxed. Buyer pays actual packing and shipping charges which will not be cheap! Email me for a shipping quote.
As all synthesizer enthusiasts know that these things are delicate and I would recommend having it looked over by a competent tech after its journey to wherever.” Auction ended. Click here to browse on eBay.
“die meisten werden wissen worum es sich handelt . erspare mir deswegen die litanei der technischen daten.
studio synth in gutem zustand . 2 tasten zeigen leicht nach oben. die kiste hat midi in, out, thru. leider nur 4 stimmig.
einer der fettesten synth und ich hatte eine menge spass damit.
wurde 2009 oder 2008 bei extended in berlin generalüberholt. kontakte gereinigt etc etc….
schwere kiste . abholung wäre toll. wenns nicht geht kann ich auch versenden. ” Auction ended. Click here to browse on eBay.
“Hi, you’re looking at a beautiful and very rare, 1979 Oberheim OB-X Eight-Voice polyphonic synthesiser. It is fully serviced, re-capped and factory calibrated with a new memory battery fitted. It sounds absolutely stunning. The OB-X sounds far superior to the later OB8 or OBXa. Why? Because unlike the OBXa and OB8, the OB-X voice circuits are based on the legendary discrete Oberheim SEM module. The OBXa and OB8 are Curtis IC based designs. The OB-X filters, VCO’s and VCA’s are fully discrete just like the SEM module.
This is a true OB-X 8-voice(ie not a modified 4 Voice) from factory! See model number picture.
I can honestly say I don’t think I have heard any better analogue strings or pads from a synthesizer, and I’ve owned nearly every vintage anlogue synth going. The sound is ridiculously organic and rich.
The Oberheim OB-X is a rare beast let alone in this saught after 8 voice configuration. The only reason I am selling is because I actually own two and I need to free up some studio space!
Superb physical condition, manual included. Fully working and professionally serviced.” Auction ended. Click here to browse on eBay.
Relisted with more info.
“OK, Take Two! This is a no reserve auction. Up for auction is one Oberheim OB-X Analog Synthesizer, serial number 794102. This is an 8 voice unit as can be seen in the photos, 4 voice cards with 2 voices each. This unit has seen better days. I acquired this synth during the summer of 2000 and it was not working then, but it did power up. I put the OB-X in storage for 9 years in a shed in my backyard with the intention of fixing it someday, then I got into acoustic music and that day never came. I had a Roland JUNO 60 for my synthesizer fix in the meantime. Unfortunately, I neglected to cover the unit while it was in storage and a mouse took up residence inside it. Our little friend made a nest of straw, bits of fabric and plastic directly on top of what I now know to be the control board. Apparently, mice don’t mind nesting amongst their own feces and urine because the control board surface was coated with both. I took some photos of the control board and you can see that some ICs and solder trails are thoroughly corroded, I believe the control board is beyond repair, but I could be wrong, maybe it could be stripped and redone, all the parts are there. The good news is that the mouse didn’t crap on the CPU which is mounted above the control board, so it looks ok as well as all 4 of the voice cards, it was just too cramped for our industrious pal to get in that area. You can see in the close up of one of the voice cards that there is no corrosion and it’s fairly clean. You can also see that some of the spring clips where the wire harness plugs into the voice cards are missing, I’m not sure if they weren’t there to begin with or if I lost them when I removed the cards for cleaning. The voice cards are the “A” version without the built in LED, but apparently you can get a kit to install your own LEDs on the cards. I’ve learned a lot about this synthesizer, mice and how to properly long term store things over the last week. One other thing is that the “HOLD” button is missing, you can see that in a photo as well, but the LED is there. Everything else is all here, the power supply, the wire harnesses, the keyboard, the wooden side panels, the voice cards, the mother board, the control board, all of the pots, the heat sinks, so there’s plenty of parts here for restoration.
I sincerely appreciate the eBayer who pointed out that I had been misinformed because they were right, I had been! I apologize for promulgating misinformation, the truth is that there is one voice per card on the OB-X and as you can see in the photo I just posted, this unit has 8 voice cards, 1 – 4 on the bottom and 5 – 8 on the top. From going back in there, I can tell you two more things, the first that this is a true piece of American craftsmanship and ingenuity, my hat is off to Tom Oberheim. But all of you “watchers” already know that. I love the hinged posts that mount the circuit boards. Second, this thing seriously smells bad. I don’t know how that mouse could stand living in there. Maybe there was a whole family and there must have been because mice are not solitary creatures, if you find one, there will be several more to follow. As I said before, Tom Sawyer turned out to be a mouse, so although I have been able to remove most of the organic debris, I’m sure that some will remain for the lucky winner of the auction.” Auction ended. Click here to browse on eBay.
“This Voice Card has been tested in an Oberheim OB-X and is in excellent working condition, this is a newer card with the LED built in , pass all tuning test.” Auction ended. Click here to browse on eBay.
“This is a vintage Oberheim OB-X built in California. This synth is not in working order, but everything is here. I’m not sure what is wrong with it, but maybe you could fix it.” Auction ended. Click here to browse on eBay.
“You are bidding on a classic Oberheim synthesizer produced in 1979* It is a 6 voice model and has Oct. 1980/81 dates printed on the voice cards. I bought this a few years ago with the intent of getting it fixed, but have decided to let it go to a new home. I purchased this synth along with a few others, and this one was not working when I bought it. It did power up but will blow the fuse every time upon powering on. This synth is being sold in non-working “as-is” condition/project or for parts. The body has some scratches and rust in places. All keys feels good, knobs feels smooth, and all buttons “click” when pressed but again no output from this one, as-is with no returns. This synth is complete, with no missing parts (besides a few screws), so this is a great chance to pick one of these up for cheap! ” Auction ended. Click here to browse on eBay. 
