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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31 Visitor comments
ian
October 30, 2011 @ 6:36 pm
Wow u-tech, you are so right! I cringed at the though of the way he was screwing with the knobs, and what the hell is that God Aweful thing he piped it through! Well, if I had an Xpander, I would treat it with the respect it deserves, and post a video with some pure bliss coming from it :~) Seems like he was tweaking while going at various tries at things that didn't seem to work... but hey... might as well make it look like you know what you're doing rather than showing that you're a total fool!
Skanker
October 21, 2011 @ 8:39 am
Can anybody tell me what the serial numbers are in relation to the US and the japanese manufacured units?
u-tech
September 26, 2011 @ 2:24 pm
that dude on the video doesn't seem to have much love for vintage synths like this
goose68
January 12, 2011 @ 6:26 pm
one of the best analogue synths ever produced - modular style mayhem in extreme - I love this synth!
Axel Katz
January 6, 2011 @ 6:15 pm
I have owned 3 Xpanders over the last 6 years. The first two were later "Japanese" ones which had the power supply PCB made out of something resembling rice crackers - and the transformer mounted on the board instead of to the case (as in US built Xpander/M12s) so if it was moved it would break the PSU board. I found these to be terribly unreliable unless the power supply & main board was re-capped and most of the IC sockets holding the filter chips were replaced with new ones.
Xpanders are amazing instruments but make sure you buy a good one from a reliable source - preferably local!
 
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  • 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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