Check the listing for details. Sequential Fourm Compact Polyphonic Analog Synthesizer. Condition: New. Listed at 999.99 USD. Take On Your Best Sonic Form in Legendary Style With an eye toward sonic design and an impressively reconstructed modern palette built on the Prophet-5 formula, the Sequential Fourm compact polyphonic analog synthesizer is firmly rooted in expression and versatility. Historic Sequential tones summoned through a 100% analog signal path make the Fourm one of the company's most eloquent synthesizers, inviting a wealth of hands-on modulation, keybed expression, and modulative experimentation to shape, play, and expand sounds beyond any creative vision. Modern implementations, including an onboard arpeggiator/sequencer engine, a top-panel modulation matrix, and 128 preloaded factory presets, take the Fourm's ancestral Prophet sonics to boundless new heights.