Sequential Oberheim OB-6 Module 6-voice Polyphonic Analog Synthesizer ModuleThe Sequential OB 6 Module 6 Voice Polyphonic Analog Synthesizer Module is a 6 voice, all analog, desktop synth inspired by Tom Oberheim's classic SEM circuits from the 1970s. Tom and Dave Smith packed the OB 6 Module with everything on your wish list. With two voltage controlled oscillators and sub oscillator per voice, a state variable filter, 64 step polyphonic step sequencer, twin digital effects engines, and more. Delivers Punchy Sonics and Six