Oberheim Xpander

Oberheim Xpander Image

The Xpander is a six-voice desktop version of the Matrix 12 with which it shares an identical voice architecture. In many ways they are the most flexible non-modular analog synths ever built. Each voice has five LFOs, each with about five different wave shapes, plus the ability to sample most other modulators; five envelopes that can repeat themselves, sync to an LFO, and so on; a lag processor (like portamento, but more general); three tracking generators (that apply a series of linear functions to a value over its range); some ramp generators (the attack portion of an envelope); a 15-mode filter and a user interface to make all of this accessible.

Oberheim Xpander Image

Another very useful feature is its CV/gate to MIDI conversion capabilities for communication with older synths. There are six CV and Gate inputs which use standard 1V/8va CV and positive gating. So you can connect up to 6 external sources delivering CV/Gate and convert that into MIDI. Ample output options offer stereo and mono outputs as well as six additional individual audio outputs (1 for each voice) allowing you to use the Xpander as a stereo polyphonic 6-voice synth, as six individual monosynths or any combination in between. There's even a 3rd party Mod (Oddernmart mod) that allows for an external audio input that can be routed through the filter. And like The Matrix synths, the Xpander sounds wonderful, capable of thick analog basses, pads and textures. It is used by Cirrus, Josh Wink, Astral Projection, Vince Clarke, DJ Sasha, Chemical Brothers, Meat Beat Manifesto and Nine Inch Nails.

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The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

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Are you looking to buy or sell a Oberheim Xpander? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

31 Visitor comments
January 6, 2013 @ 1:03 pm
Been lusting after ne of these for a while now, Amazing synth!!!
October 30, 2012 @ 1:07 pm
Its a super sound module, cant be compared with any DCO-controlled synth.
But since it a pain to program... One cant just think "ok then ill just se time on it"
cos one has to jump back and fort back and forth for parameters that interact
until one has had enough. But its worth the price anyway cos its unbeatable sound,
and id there are software to program it, its a top synth. And, it can be hard and aggressive but not really.. but for anything thats not meant to be really agressive its a dream
October 24, 2012 @ 10:05 am
Hi there someone who could give me a sound library? or a link to download new sounds
I would be most grateful! thanks
May 22, 2012 @ 6:24 pm
Hi guys,

Wanna just let you know that an new editor for the Xpander/Matrix-12 exists, it's called Xplorer. Just google "Xplorer oberheim editor" to know everything about it. You'll discover a new programming Xperience with that synth. Check the video demos !
Red Right Hand
May 16, 2012 @ 9:20 am
@skanker. Not really a question of not knowing how to program it - I just didn't enjoy the experience. Largely due to those noisy, clicking pots but mainly because my other 'lesser' analogs (and even some VA's) sounded fundamentally better.

It's really bad practice to call a person's programming skills into disrepute though (especially when you've never heard said skills). I see that a lot around here and it always makes the aggressor sound like whiney little [beep] queen who doesn't have a better argument...

No disrespect.
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Rated 4.14 (333 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - 6 voices
  • Oscillators - 12 VCOs (2 per voice), Linear FM
  • LFO - 5 LFO's
  • Filter - 1, 2, 3, 4 pole low pass; 1, 2, 3 pole hi pass, bandpass, notch, phase shift
  • VCA - 15 per voice, 5 ADSR envelope gens per voice
  • Keyboard - None
  • Memory - 100 single / 100 multi
  • Control - MIDI In/Out/Thru, 6 CV/Gate Inputs, Trigger, 2 pedal inputs
  • Date Produced - 1984-88
  • Resources & Credits
  • Images from
    and Tone Tweakers.

    Thanks to Jimmy and DAC Crowell for providing this information.

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