Sequential Fourm 4-Voice Polyphonic Analogue Synthesizer
Sequential - Fourm, 37-Key 4-Voice Polyphonic Analogue Synthesizer with 128 Presets
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4-Voice Polyphonic Analogue Synthesizer
Sequential - Fourm
Legendary Analogue Sound, ReimaginedThe Sequential Fourm delivers four genuine voices of Sequential analogue sound, built on the legendary Prophet-5 voice architecture—right down to its envelope response curves. With dual oscillators offering simultaneous wave selection and a classic 4-pole low-pass filter, now enhanced with bass compensation, Fourm captures the warmth and punch that shaped a generation—and takes it to the next level.
Fourm’s 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 analogue polysynth. Inspired by the Pro~One, Fourm’s top-panel modulation matrix puts deep sound design at your fingertips—no menu diving required. Route sources and destinations with a button press, visualize connections with colour-coded indicators, and build complex modulation paths in seconds. It’s fast, intuitive, and designed to keep you in the creative flow.
100%Analogue
37-NoteKeyboard
128Presets
Amazing Features
• 37-note slim-key keyboard with polyphonic aftertouch
• Warm and organic, 100% analogue 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
The Tech Spec
| Features | Specification | Synthesis | All oscillators have simultaneously selectable waveforms – LFO too Oscillator B supports low frequency modes Classic Prophet-style Sync 4-Pole resonant lowpass filter Feedback with aggressive drive circuit 2 ADSR envelopes Sequencer supports glide per step |
|---|---|
| In/Out | Main output mono (1/4” jack) Headphone output mono (1/4” TRS phone jack) MIDI in, out, and thru ports USB for bidirectional MIDI communication Footswitch/expression pedal input |
| Power | Separate power switch 12V DC 1.2A power supply, center-positive (included) Can be plugged into an AC outlet capable of supplying from 100 V to 240 V at 50 Hz/60 Hz 14 Watts maximum power consumption |
| Dimensions (L x W x H) | 22.13" x 9.88" x 2.75" 56.2 cm x 25.1 cm x 7.0 cm |
| Weight | 8.76 lbs. (3.97 kg) |
PayPal Credit
| Monthly Payment: | £63.33 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £699.00 |
| Total inc. interest: | £759.94 |
| Monthly Payment: | £34.13 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £699.00 |
| Total inc. interest: | £819.13 |
| Monthly Payment: | £24.48 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £699.00 |
| Total inc. interest: | £881.18 |
| Example | |
| Minimum Spend: | £99 |
| Instalment Rate: | N/A |
| Cost of purchase: | £99 |
| Total inc. interest: | £99 |
Representative Example:
Purchase Rate: 23.9% p.a. (variable)
Representative: 23.9% APR (variable)
Assumed Credit Limit: £1,200
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