If you're into vintage gear, you've probably come across our website. We've been buying, refurbishing and selling vintage synths and other electronic musical instruments for close to 30 years now. We're perfectionists and take our business, our gear, and our customers very seriously, so buy with full confidence - we won't let you down.

Our prices here may seem high, but we are a legit business with real business expenses, not your typical amateur seller with a Reverb store. Please click on our user name to read more about our shop so you better understand our prices & high standards.

Reverb and merchant fees are of course already added into our prices here.


***As this is a high value item, we will require pre-payment by bank wire transfer only. Please contact us before attempting to buy this item and wait to hear back from us.

This unit came to us in relatively good working order, but these synths need a full rebuild in order to work like new again and be as reliable as possible, so that's what we did. It's been meticulously cleaned inside and out and electronically refurbished so it's working exactly as it should, no surprises (unlike most!). We also took future-proofing measures, so it will hopefully outlast all others. This process took approximately 37 hours of valuable skilled labor which is of course factored into our price - you get what you pay for. See the photos below. This ob-xa contains a JL Cooper MIDI retrofit.

This unit should be more in tune than others out there as not only has it been meticulously refurbished, but it also includes our custom tuning stabilization modifications.

Here's a rundown of what our tech did - there could be more things left out:

Disassembled and cleaned inside and out
Keyboard mechanism rebuilt: 
Old bushings removed and replaced with new bushings
Key guides adjusted
Bus bars cleaned
Key contacts cleaned
Keys cleaned and reinstalled
Replaced power supply caps, replaced IC socket, diodes, trims
Lots of molex connector terminals replaced
Jacks cleaned
All pots cleaned
VCO trimpots replaced for more stable tuning
Replaced most electrolytic capacitors
Replaced 4053 logic IC chips x3
Replaced CV section TL082 IC chips x8
Replaced CA3080 VCAs IC chips in CV section x8
Replaced battery
Reloaded patch data
Replaced wooden sides
Repaired often defective pitchbend



-Please read our shipping policy & terms before buying. They are firm.

-International customers please contact us before buying and wait to hear back to make sure shipping quote is accurate.

-***WE NEED APPROXIMATELY 1-2 WEEKS TO PACK AND SHIP ITEMS, AND DELAYS CAN OCCUR. If you can’t wait patiently, please don’t buy this item as we can’t rush things.***

-We are an online-only store and are unable to offer local pickups.

-Quality control and customer satisfaction are our top priorities. We go to great lengths to test, service and even future-proof most (but not all) of the items we sell so they’re better than others you may find. We test most items multiple times and overlook nothing.When items are not working perfectly, they are accurately described. Physical imperfections can be seen in the detailed photos present here. This sale includes only what's shown in the photos (or itemized in this listing), nothing more and nothing less. Please search our website for additional photos.

-All sales are final. We do not accept returns or issue refunds, so please be sure you know you want this item before buying it.

-Due to the vintage and electronic nature of our items, we sell all items strictly as is, only because we cannot control what other people do to our items once they leave here, we cannot offer warranties on parts that are decades out of their original warranties, and we don’t want to be scammed or inconvenienced by people who abuse return policies or have buyer's remorse.

-In the extremely unlikely event that there’s a problem with an item we sell you, please contact us immediately so we can try to help.

-Thank you so much for your time, interest, and support. We look forward to doing business with you! If you need anything, please don’t hesitate to ask.

-Any date of manufacture shown here is just a guess.

-We generally set our condition ratings to "excellent", but please refer to the photos and writeup so you can have a better understanding of this items condition.

Reverb Buyer Protection

Reverb has your back if your item is lost, damaged, or doesn't match its description. Simply report any issues within 7 days and we'll help you get a full refund.Learn more about Reverb Buyer Protection.

Listed5 months ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
  • OB-Xa 61-Key 8-Voice Synthesizer
  • 1979
Number of Keys
  • 61 Keys
Keyboard Action
  • Synth Action
Analog / Digital
  • Analog
  • 8 Voices
Key Size
  • Full Size

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Astoria, NY, United States
Joined Reverb:2019

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

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