Sequential Fourm 4-Voice Analog Synthesizer w/ Polyphonic Aftertouch

The Sequential Fourm is a compact, expressive 4‐voice analog synthesizer with polyphonic aftertouch, designed to inspire creativity. Combining iconic Sequential tone, hands‐on modulation, and a uniquely responsive keybed, Fourm transforms musical ideas into fully realised performances.

Built on the legendary Prophet‐5 voice architecture, Fourm delivers four true analog voices with the warmth and punch that defined a generation. Dual oscillators with simultaneous wave selection and a 4‐pole resonant lowpass filter with bass compensation ensure every note is rich, dynamic, and full of character.

The 37‐note slim‐key keyboard with polyphonic aftertouch unlocks expressive techniques such as note bends, swells, and nuanced articulations. A Pro~One‐inspired top‐panel modulation matrix puts deep sound design at your fingertips, with visual feedback from colour‐coded LEDs and immediate routing ‐ no menu diving required.