Analog Semi-Modular Synthesizer with 2 VCOs Featuring 7 Variable Waveshapes and Unique “Kobol” VCF in Eurorack Format. Master the waves and shape them in any way you want. The Behringer KOBOL EXPANDER is about to be your latest spell book in an infinite sea of beats, pulses and voltages. The Behringer KOBOL EXPANDER is a duophonic analogue synthesizer featuring 2 VCOs allowing morphing between 7 waveforms, oscillator synchronization and pulse-width modulation that bring back to life the original circuits of the 70s. A unique 4-pole VCF also provides this natural saturation only found in “Kobol” synths. Get that massive-as-a-bull sound that only the KOBOL EXPANDER from Behringer can deliver. It’s an amazing synth that opens up so many possibilities!