Description
Fourm is a cutting-edge analogue synthesizer that empowers musicians with expressive performance and intuitive control. Featuring Sequential’s renowned tone, a knob-per-function interface, and the innovative Tactive™ polyphonic aftertouch keybed, Fourm delivers a rich, hands-on experience designed for modern synth enthusiasts seeking immediacy, nuance, and authentic analogue presence.
From classic Prophet-style warmth to dynamic modulation at your fingertips, Fourm inspires creativity and responsiveness with every note.
Main Features
- Tactive 37-note slim-key keyboard with polyphonic aftertouch for detailed expression
- 100% fully analogue signal path preserving warm, vintage sound
- Knob-per-function design for immediate, tactile control
- Modulation matrix inspired by the legendary Pro-One synthesizer
- Prophet heritage 4-pole resonant filter with bass compensation for full-bodied tones
- Versatile arpeggiator with deep sequencer integration
- 256 expertly crafted presets for instant inspiration
- Robust all-steel chassis built for professional use
Classic Sequential Analog Design
Fourm’s four true analogue voices are modelled on the iconic Prophet-5 architecture, including signature envelope curves and unmistakable warmth. Dual oscillators allow simultaneous waveform selection, while the 4-pole low-pass filter with bass compensation maintains richness and clarity even at high resonance settings.
Dual Analogue Oscillators
Inspired by the original Prophet-5 Rev 2, Fourm’s oscillators deliver:
- Vintage richness and character
- Exceptional tuning stability and reliability
- Consistent performance in studio and live scenarios
4-Pole Filter with Low-End Integrity
Boost filter resonance without sacrificing definition or power, perfect for sculpting bold basses or shimmering leads with sonic depth.
A New Dimension of Expression
Tactive™ Keybed
Slim, custom-designed keys provide a responsive, balanced feel ideal for fast articulations or sustained, expressive play.
Polyphonic Aftertouch
Activate modulation per note—control filter sweeps, vibrato, pitch bends and evolving timbres directly from the keys. This powerful feature returns to Sequential keyboards for the first time in over 40 years, bringing an intimate connection between player and instrument.
Hands-On Modulation Inspired by Sequential History
Drawing inspiration from the revered Pro-One, Fourm’s modulation section offers immediate access to:
- Oscillator modulation
- Filter movement
- Rhythmic shaping
- LFO texture variation
- Envelope-driven modulation
Experience intuitive sound design with instant results—no menu diving needed.
Arpeggiator and Sequencer – Creative Performance Engines
Flexible Arpeggiator
Six modes create hypnotic rhythmic patterns or evolving harmonic sequences featuring:
- Multi-octave range
- Re-latching options
- Syncopated and dotted timing variations
Deep Polyphonic Sequencer
Craft intricate patterns with:
- Chord and tie capabilities
- Rest and per-step glide (acid-style) functions
- Full filter and parameter sequencing
- Extensive modulation integration
Fourm excels both on stage and in composition.
Specifications
Synthesis
- Dual analogue oscillators with simultaneous waveform selection
- Prophet-style oscillator sync
- Classic 4-pole resonant low-pass filter with bass compensation
- Dedicated feedback drive circuit
- Two ADSR envelopes
- LFO with selectable waveforms
Sequencing
- Polyphonic step sequencer with per-step glide
- Modulation sequencing
Connectivity
- Mono main output (¼ inch jack)
- Mono headphone output (¼ inch TRS)
- MIDI In/Out/Thru
- USB for bidirectional MIDI
- Footswitch and expression pedal input
Power
- Separate power switch
- 12V DC 1.2A power supply included
- Worldwide AC compatibility (100–240 V, 50/60 Hz)
- Maximum power consumption 14W
Dimensions & Weight
- 56.2 x 25.1 x 7.0 cm
- 3.97 kg
- Includes anti-theft slot
Fourm is a masterfully crafted analogue synthesizer that blends Sequential’s heritage with modern playability. It’s designed for musicians who demand authentic tone, tactile depth, and expressive performance in a compact package.
Frequently Asked Questions
➤ What makes Fourm’s Tactive™ keybed unique?
The Tactive™ slim keybed offers polyphonic aftertouch, allowing per-note modulation for greater expression. This feature enables real-time control over filter sweeps, vibrato, pitch bends and evolving sounds directly from the keys, enhancing performance nuance.
➤ Does Fourm provide full analogue sound?
Yes, Fourm features a 100% fully analogue signal path including dual oscillators, a 4-pole resonant low-pass filter with bass compensation, and analogue envelopes to deliver warm and rich sound quality.
➤ How easy is it to control sound design parameters on Fourm?
With its knob-per-function layout and modulation matrix inspired by Sequential’s Pro-One, Fourm offers immediate, hands-on control without the need for menu navigation. This facilitates intuitive and dynamic sound shaping.
➤ Can I integrate Fourm with other gear?
Absolutely. Fourm includes MIDI In/Out/Thru, USB MIDI connectivity, and a footswitch/expression pedal input for smooth integration with studio and live setups.
➤ What performance features does the arpeggiator offer?
The arpeggiator supports six modes with multi-octave spreading, re-latching behaviours, and syncopated repeat timings such as dotted eighth notes, providing flexible rhythmic and harmonic pattern creation.
Delivery
This item is normally sent to Mainland UK addresses by DPD who generally provide a one-hour window of delivery on the morning of delivery by email or text message.
Mainland UK: FREE delivery within mainland UK
UK Non-Mainland: from £12.99
We regret that we do not ship this item outside the UK
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Warranty Information
Sequential Warranty Information: 1 Year
Please note this information is provided for guidance only as manufacturer warranties may be updated from time to time
3 years warranty for VIP members
