Oberheim OB-X

“Vintage Oberheim OB-X w/ Kenton MIDI kit installed. OB-X was serviced by vintage synth specialist in Montreal. Rear plate indicates 4 voice but original 6 voice cards were installed at Oberheim factory. I’m the 3rd owner of this synth. Black custom side panels were made to order but the original wood sides are included. ”
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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-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 OB-X Project Machine

“The OBX was produced from 1979 to 1982 or thereabouts. I bought this one second hand in 1984. It does not work in its current condition. All knobs are missing. Power switch works and lights on panel flash on and off kind of randomly and it makes random pitches. Keyboard has no effect but pitch bend wheel does.
Need a ground up restoration. Comes with Calzone hard case that also serves as a stand for sitting keyboardists.
Some light rust on case, no visible rust on unit including inside. No obvious indication of mold.
Free local pick up.
Okay, so ALL the eight sound boards are intact. The ones you see are number 5-8. 1-4 are underneath as per the last photo I just added. There are a couple of screw missing (as with it’s present owner) and the plastic sleeve that surrounded the pitch and mod levers is missing. That and the knobs. I have a feeling I know where the knobs are and if they are returned to me I will send them later (you pay shipping) ” Click here to search for synths on eBay

Oberheim OB-X Project Machine

“Not a common synth to find on Ebay – there is one on Reverb for 10K

at the moment. Holy Grail for you vintage analog synth buffs. Dates to 1979.

cosmetically very nice, has a couple scratched keys and some normal age but

faces up well and not missing or broken knobs. Serial Tag on back stamped 6 Voice

I know these came in 4, 6 or 8 voice. no too many of this model made

Comes as seen, Please see all pictures. I too pics of the inside as well so you see exactly what you are getting.

powers on, some of the LED on the buttons on the left side just blink but the unit has No Sounds / output

all keys are there and move – not damaged – a couple are scratched.

Quite a rare unit and well worth the investment of having it brought back to life

I do not know a Synth tech that I can trust with this unit so I will leave it to you to

get it done right!

Since it will need service so it will be sold AS – IS No Returns”
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Oberheim OB-X

” Behold my RARE Oberheim OBX, upgraded to 8 voices (originally 6). You will not see a 100% fully functional Rev 1.0 in such pristine condition, possibly ever.

Made in 1978, only one of ~300 Rev 1.0 OBX synths in the WORLD!

Pro-serviced in 2018 by Greg M of Analog Synth Service (Oakland, CA). Service included full maintenance and oscillator calibration.

Synth will be professionally packed in double-wall box, and shipped via Flat Rate Freight. 8th voice card is being tested and may arrive separately. ” Click here to search for synths on eBay