used

Oberheim Expander used vintage

Regular price $4,000.00

Oberheim Expander used vintage

Museum quality condition. Excellent example of a classic. Works perfectly and looks flawless.

  • 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

Blurb from synth museum.com

The Xpander was Oberheim's first synth product that was designed from the ground up with MIDI in mind. It was a 6-voice, multitimbral analog synthesizer with an extremelyflexible design. Each voice or group of voices could either be assigned to respond to a specific MIDI channel (1-16), to a specific keyboard range on a specific MIDI channel, or to any of 6 CV/Gate (1volt/octave) inputs. The output of each voice could be panned separately (7-positions) in the stereo output, or accessed individually through their own separate direct output. The Xpander also had a mono (summed stereo) output.

Each voice consisted of 2 VCOs (triangle, saw, pulse, or noise, VCO2 could be synced to VCO1), a multimode VCF (low-pass, band-pass, notch-pass, high-pass and four "combination" filter modes), and 4 VCA's (in line one after each oscillator and two after the VCF). FM of VCO1 and the VCF was possible via VCO1. The filters could also be set as 1-pole (6dB/octave), 2-pole (12dB/octave), 3-pole (18dB/octave), or 4-pole (24dB/octave). All oscillators and filters could be tuned by a handy auto-tuned routine. In addition to this basic synth engine, the Xpander had a number of separate modules that could be inserted in any modulation path. These include (5) LFO's with basic waves plus sample-and-hold and random functions, 3 tracking generators, 3 ramp generators, a lag processor (does not necessarily have to be used for portamento), and 1 additional global LFO to be used with the Mod Wheel.

You could store 100 program patches and then set up an additional 100 multi-timbre setups storing any of those patches on each of the 6 voices, panning them and assigning how each voice is controlled. Patches could be dumped to cassette or via MIDI sys-exe.


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