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The rack version of the RSF Kobol with a great sounding and very snappy SSM filter.
The Kobol Rack (Expander I) was essentially only the VCO/VCF/VCA/LFO sections of the Kobol in a rack module. The Expander 2 was an add-on to the Kobol that added some new processing modules such as ring modulation, sample-hold, andenvelope followers as well as extra VCA and LFO modules.

The Kobol looked and sounded great, andwas quickly snapped up by the big names in synthesizers of the time. But beinga small French company, RSF were never able to truly mass produce these.
About 800 Kobol Racks were made, 200 Expander 2's. This makes them quite rare!

They have been used by Vince Clarke,Vangelis, Jean-Michel Jarre, Depeche Mode, Peter Gabriel and Hans Zimmer.

The RSF Expander II rack mount modular synth was manufactured as a companionoption module for the Kobol Expander I synthesizer. The19" 3 U space unit features a Ring Modulator, Envelope, a VCA, an LFO,Mixer with 3 inputs and 1 output. Additionally it has a Sample & Holdmodule with internal or external clock, a Noise Generator, Voltage processorthat is delectable Linear or Logarithmic, Voltage Inverter, Gate Delay, anEnvelope Follower, Lag Generator, and finally 2 multiples.

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Listed2 years ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
  • Kobol Expander I and II
Made In
  • France

Victor’s Vintage Gear Market

Rotterdam, Netherlands
Joined Reverb:2017

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