Oberheim OB-Mx

Oberheim OB-Mx Image

The OBMx is a modern synthesizer module with an audio path that is entirely analog. It has an intuitive and powerful interface which makes it easy for anyone to program their own unique sounds. The OBMx claims to deliver the classic Oberheim and Minimoog sounds while being completely programmable and midi compatible.

One historical point is that the OB-Mx is, at present, the last synthesizer designed by Don Buchla. Buchla has sort of disowned this unit, though. Its filters are actually pretty bad. They don't manage to emulate either the 2-pole Oberheim or 4-pole Moog filters In fact they sound notoriously thin and tweezy. The so-called 'Oberheim filter' provides 12 dB/oct low, band or hi pass filtering, with resonance. And the 'Minimoog filter' uses a meatier 24 dB/oct low-pass filter.

The OB-Mx was one of the few real analog synths, however, available with completely modern features. And because it comes from Oberheim, you can expect great sounds, design, and features. The OB-Mx is highly user upgradeable. Out of the box the OB-Mx comes with one two voice expansion card which contains the two oscillators, 4 multistage envelopes, 3 LFO's, and filters. Up to 6 of these cards can be easily installed sufficiently adding to the phattness of this synth and its capabilities. Unfortunately, the high cost of extra voice cards also made a fully-outfitted OB-Mx a very pricey proposition when put up against other more commonly-available digital instruments of its time. It has been used by Nine Inch Nails, Sneaker Pimps, Apollo 440, DJ Spinna, and U2.

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11 Visitor comments
March 4, 2011 @ 5:38 pm
The attached video really doesn't do it justice. Who, seriously, uses a camcorder audio recording to show what's best about a synthesizer? The same owner has another short "video" that is audio only, displaying a greater range of sounds much more clearly during patch changes. The YouTube link is http://www.youtube.com/watch?v=WTQ2MLVQN4E. Seriously, just going by this video, my Korg MS2000B can produce better sound, and I'd stick with that rather than invest more money into an Obie. But there are other Obie videos that show just what it CAN do, and those make it a tempting treat.
April 30, 2010 @ 5:08 am
Powered the OBMX up last night after an extended studio refit and I still don't quite understand why it seems to be either loved or hated.

It isn't perfect, nothing is, but everyone is different in what they want from a synth.

After many years with the thing (in fact, this goes for all my synths) I really can't say what it isn't good at. My brain doesn't work like that. If I can't get what I want from it, I move onto another synth (but often en-route I've found a few more inspirational sounds in the Obie and gone off in a synthy tangent).

I agree everyone should try before they buy........but doesn't that go for everything?

I couldn't recommend it as an "only synth" (who would?), but my goodness it is fun, tactile, powerful and inspirational!
December 14, 2009 @ 3:25 pm
I had one of these for quite a few years & it barely ever got used on the final wersions of any tracks. Didn't sit well in the mix, horrible filters. I'm sorry to say I was really un impressed with it & I wouldn't recommend it at all...
December 29, 2008 @ 6:59 am
I was really afraid to get this after reading some reviews and comments. But i just liked the tone... and it's monster. I have 4-voice version and it sounds huge to me. I leave poly-sounds to my other analogs (Omega-8, SunSyn, Andromeda) and hybrids (Q+ PE). I can recommend to take a try if possible. Spec list is long and it keeps you busy for hours to tweak it. It easy to get into it if you have basic knowledge of (v)analogsynths. Time shows if there will be any problems with the hard- or software... hope not.
October 11, 2008 @ 9:41 am
Yeah right, JP can't touch the modulation of the Obie. For me OB-MX (I have 6-voice) is amazing synth. I also have other analog polys JP6, JP8, Andromeda to mention few.
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Rated 3.78 (218 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 - 2 voice (expandable to 12)
  • Oscillators - 2 per voice; Triangle, Sawtooth, Pulse Width waveforms
  • LFO - 3 LFOs (triangle, sawtooth, sample/hold)
  • Filter - 2 filters per voice; Resonant 12 dB/oct Oberheim type filter with low, band, hi pass and a 24 dB/oct Minimoog low-pass filter section
  • VCA - 4 multistage envelopes per voice
  • Keyboard - None
  • Memory - 256 patches, 256 performances
  • Control - MIDI (12 parts)
  • Date Produced - 1994
  • Resources & Credits
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