Sequential Fourm Polyphonic Analogue Synthesizer
Legendary Analogue Sound
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Want to Click and Collect or try items at our Guildford Store?
The store is open 10am - 6pm Monday to Saturday and 11am - 5pm Sunday and bank holidays.
The stock information shows the quantity of units that are available to purchase at the Guildford store and the quantity of units that are available at our off-site Guildford warehouse. These stock levels are updated in real time.
Our Click and Collect service is available at our Guildford store from 10am - 6pm Monday to Saturday, and 11am - 5pm on Sunday. You can either choose click and collect as your delivery option online or, during store opening hours, call our sales team at 01483 456777 to place a 10% deposit.
If you have placed your order online, you will receive a confirmation email of your order and a separate follow-up text or email to confirm when your item is ready for collection.
Please do not come to the store before you have received the follow-up message, as your order may not yet be ready at the store.
If the only available stock is in our off-site warehouse it can be brought to the store location for you to try - you just need to contact the store within opening hours. Please note any requests received after 3.30pm will not arrive at the store until the following morning.
Please be aware that, unless you have paid a deposit to reserve the item, it will continue to be free, both online and in-store, for another customer to buy. Therefore we would advise you to place a 10% deposit by either using the on-line click and collect service or calling us 01483 456777.
SKU: SEQ-3900
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Product Description
The Sequential Fourm is a compact, four-voice analogue synthesiser designed to inspire creativity and deliver expressive performance. Built on the legendary Prophet-5 architecture, Fourm combines classic warmth with modern versatility. Each of its dual oscillators offers simultaneous waveform selection, complemented by a 4-pole resonant filter with bass compensation, capturing the iconic analogue character that has shaped music for decades. The 37-note slim-key keyboard with polyphonic aftertouch allows intricate performance techniques, including note bends and expressive voice swells. Fourm’s intuitive knob-per-function layout and top-panel modulation matrix make complex sound design accessible without menu diving. With 128 world-class presets, an arpeggiator with sequencer mode, and robust all-steel construction, Fourm is both a reliable studio instrument and a dynamic performance tool. Its extensive connectivity, including USB MIDI, traditional MIDI ports, and expression pedal inputs, ensures integration into any setup. Designed for musicians seeking hands-on control, responsive touch, and legendary Sequential tone, Fourm is a versatile partner for both seasoned synth enthusiasts and newcomers seeking analogue excellence.
Key Features:
- 37-Note Slim-Key Keyboard with Polyphonic Aftertouch:
The responsive keyboard allows expressive playing, enabling techniques like solo voice swells and note bends for nuanced performance articulation. - Classic Analogue Sound Engine:
Fourm delivers warm, organic analogue tones with dual oscillators, a resonant filter, and aggressive drive, faithfully reproducing the legendary Sequential character. - Intuitive Modulation Matrix:
Route sources to destinations quickly with colour-coded indicators, making complex modulation simple, visual, and fast without navigating menus.
Legendary Analogue Tone:
Fourm draws on the heritage of the Prophet-5, offering four genuine analogue voices with dual oscillators, selectable waveforms, and a 4-pole low-pass filter. Bass compensation enhances low-end clarity, ensuring rich, dynamic sound. The synthesizer captures the warmth, punch, and character that defined classic analogue instruments while adding modern reliability and precision. Its two ADSR envelopes, oscillator sync, and feedback circuitry provide extensive sound-shaping possibilities, making Fourm a versatile tool for studio production and live performance alike.
Expressive Playability:
The 37-note slim-key keyboard with polyphonic aftertouch expands the performer’s capabilities, allowing guitar-style note bends and expressive voice swells. Every nuance of your playing translates into the sound, making Fourm ideal for musicians who value both precision and feel. The responsive keybed paired with immediate access to modulation ensures that creative ideas flow freely and that performances remain highly expressive and dynamic.
Seamless Sound Design:
Fourm’s Pro-One inspired top-panel modulation matrix simplifies routing, making complex modulation accessible at a glance. Colour-coded indicators visualise connections, and knob-per-function controls keep workflow intuitive. With 128 presets, an arpeggiator, and a step sequencer, sound design is both immediate and deep, supporting a wide range of sonic textures for electronic, experimental, and contemporary music styles.
Specifications:
- 37-note slim-key keyboard with polyphonic aftertouch
- 100% analogue signal path
- 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
- Dual oscillators with selectable waveforms
- Oscillator B supports low-frequency modes
- Classic Prophet-style sync
- 4-pole resonant low-pass filter with feedback drive
- Two ADSR envelopes
- Sequencer supports glide per step
- Main output mono (1/4” jack)
- Headphone output mono (1/4” TRS jack)
- MIDI in, out, and thru
- USB for bidirectional MIDI
- Footswitch/expression pedal input
- 12V DC 1.2A power supply included
- Dimensions: 56.2 cm x 25.1 cm x 7.0 cm
- Weight: 3.97 kg
- 14 Watts maximum power consumption
- Anti-theft slot