“Very rare vintage RSF Kobol Expander I in near MINT visual conditions and FULLY working. It’s a monstrous analog semi-modular synthesizer based on SSM2040 + SSM2050 IC’s and Fairchild UA726. Its sound is impressive, very powerful on basses and awesome filter!!! Also it’s possible to change all the waveforms by control voltage (Waveshaper VCO’s)… It come with special option patch-control and programmer-ready sockets (all on the back). Working voltage supply: 220 / 240 volts. ” Auction ended. Click here to browse on eBay.