SKU: 81480990788

Oberheim OB-SX

Sale price$3599.99 Regular price$3999.99
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Description

Oberheim OB-SXOberheim OB SX For Sale Refurbished, Future proofed & Improved We paid our tech to fully overhaul and future proof this unit so it would not only work like new for its next owner but to also hopefully extend its life way beyond others you may find. The following work was done, sparing no expense, and the resulting instrument is better than all others of its kind and is of course priced higher than the others to reflect the work we did to ours that

Oberheim OB-SX For Sale Refurbished, Future-proofed & Improved

We paid our tech to fully overhaul and future-proof this unit so it would not only work like new for its next owner but to also hopefully extend its life way beyond others you may find. The following work was done, sparing no expense, and the resulting instrument is better than all others of its kind and is of course priced higher than the others to reflect the work we did to ours that other sellers didn't do to theirs. Ours should tune better too. You get what you pay for. 

Disassembled and cleaned inside and out.
Dip switches replaced.
Power switch replaced.
Cleaned all pots. 
Voice mother board.
Replaced molex terminals in power section. 
Resoldered connector pins.
Replaced autotune resistors for more precision. 
Replaced VCO range trims, scaling trims.
Replaced power supply electrolytic capacitors, trimpots.
Replaced 4051s x6.
Replaced gate IC59 (4099 x1).
Adjusted power supply voltage.
Voice cards: Replaced resistors for precision tuning, trimpots, electrolytic caps.
Recalibrated VCOs, VCFs.
Replaced pitch bend and mod wheel lever pots.
Cleaned jacks.
Removed and cleaned all keys, cleaned keyboard chassis.
Removed old bushings, adjusted metal guides, replaced with new bushings.
Cleaned J-wires.
Cleaned and lubed bus bars.
Extended burn in test and several systematic tests to ensure reliability. 
See video below! 

This represents a rare opportunity to buy an OB-SX that works perfectly, tunes better than others, and will hopefully keep working perfectly long into the future. We wouldn't sell it if we didn't have another just like it in our studio collection.

For years, we avoided buying this vintage analog polysynth because it was preset-only. However, someone recently created a MIDI retrofit (not included) that plugs into the communication port on the back of it that also allows for full editing of all parameters via MIDI CC data, bringing this synth up to the legendary level of the OBX, OBXa and OB8! To us, it sounds like a cross between an OBXa and OB8, plus it's got the benefit of being smaller and lighter. Even without this retrofit, it's a great synth with knobs for some very important parameters on the front panel so you can make adjustments to customize the preset sounds. 

Here's a video of this OBSX in action:

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 81480990788

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4.9 ★★★★★
Based on 22 reviews
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Product Reviews
A
Verified Purchase
Ash
Natrona Heights, US
★★★★★ 5
Actually amazing hub, it just works!
Color: Space grey
This dock is carrying my handheld system so hard right now, and for such a good price. I have literally every port filled including using the HDMI and it hasn't failed on me at all.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
E
Verified Purchase
Elaine Enoch
Carnegie, US
★★★★★ 5
Functional and portable
Color: Space grey
Very useful to organize multi connections needed for home office work set up. Small and portable.
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Reviewed in the United States on June 8, 2026
A
Verified Purchase
A Humble Opinion
Massapequa, US
★★★★★ 4
Good little device
Color: Space grey
Nice little device. Works well with external drives and HDMI connections to a MacBook Air. Doesn't work great with a mouse USB 2 donegal - sporadic. Does work with USB 2 keyboard and a monitor HDMI for creating a "docking station" for my MacBook, but difficult with no mouse option. Good quality. Fairly compact. Nice color! Decent value for money for a known brand.
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Reviewed in the United States on May 3, 2026
T
Verified Purchase
tamerbey
Charlottesville, US
★★★★★ 5
No annoying "Disk not ejected properly" messages!
Color: Space grey
I use these with MacBook Airs, both Intel and Apple M3, and they stay connected. Previous —cheaper—dongles kept disconnecting with no apparent moving of the computer or the dongle. I'd get the annoying "Disk not ejected properly" message repeatedly, meaning I'd have to remove the dongle plug, reinsert it, and hope that the external device showed up on the computer and stayed connected. These always stay connected and seem to work well for the external devices I use. I think it's in the plug: with the Acer, I hear a distinct little click when the plug is fully inserted—perhaps some subtle locking mechanism the cheaper dongles did not have.
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Reviewed in the United States on May 5, 2026
Z
Verified Purchase
Zachary Nichols
Lowell, US
★★★★★ 5
Instantly addressed a defective unit
Color: Space grey
2nd EDIT: Not only did the company offer a refund, they also generously shipped me another unit, and it works just as it should! They gave fast responses when the first unit gave me issues, and addressed it as well as you possibly could. I would use them any time! EDIT: the company quickly reached out and offered a full refund as a result of a faulty product. For me, that goes a long way. I have plenty of ACER products and normally have no issues with them. could have just been a faulty single product. Very bummed. For the first 2 hours of use it worked great. When it’s just USB-C to HDMI connected it works fine, but the second I go to plug my Mac in, while using the HDMI to stream to my monitor, the screen begins flashing every second or two on both my Mac, and the monitor. The flashing screen is happening at the same time the Mac keeps making its “chime” that the charger is connected, over and over again. Clearly something is going on that the charging is not staying active. whenever the charger is first connected it causes a quick(ish)black screen, which I could live with if it just happened right as I plugged the charger in… but when the charger KEEPS thinkings it’s just getting plugged in over and over, and keeps flashing, it kind of makes the product useless. And I’ve already thrown the box away so I guess I’m stuck with a product that doesn’t work. Super bummer.
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Reviewed in the United States on January 6, 2024

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