The Sequential Fourm is a compact, expressive analog synthesiser designed to Inspire. With its iconic Sequential tone, hands-on modulation, and a uniquely responsive Tactive keybed, Fourm is a creative partner that brings your musical ideas to life.

Built on the legendary Prophet-5 voice architecture, it has four true analog voices with the unmistakable warmth and punch that defined a generation. Dual oscillators with simultaneous wave selection and a classic 4-pole low-pass filter (now with bass compensation) ensure that every note hits harder than the last.

Fourm’s Tactive 37-note slim-key keyboard features polyphonic aftertouch, unlocking expressive techniques like guitar-style note bends, solo voice swells, and other nuanced articulations—completely transforming the experience of playing a modern Sequential polysynth.

Features

• The Tactive 37-note slim-key keyboard with polyphonic aftertouch
• Warm and organic, 100% analog signal path
• Intuitive, welcoming knob-per-function layout
• Pro~One style top-panel modulation matrix
• Prophet-lineage resonant filter with bass compensation
• Arpeggiator with sequencer mode
• 128 world-class presets
• Pro-quality, all-steel chassis

Video: https://youtu.be/vMyuN-vp_nI

Product Specs

• Item Number: 39506
• Make: Sequential
• Model: Fourm
• Condition: Brand New
• Finish: Black
• Categories: keyboards-and-synths ⇒ analog-synths
• Made In: United States
• MPN: SEQ-3900