Sequential Fourm Synthesizer Information, Specifications and Resources
Author: Andy Merrett / Data Driven
Overview
The Sequential Fourm is a synthesizer released in 2025. It is aimed at musicians wanting to create and modify their own sounds.
The Fourm has 37 synth/organ style full sized keys with touch sensitivity and aftertouch. It has eight notes of polyphony. It has four on board sounds but no acoustic piano sounds, and a sustain/damper pedal.
It has built-in MIDI capabilities. It has no built-in learning system. It has no built-in speakers which means you will have to connect it to external amplification and speakers in order to hear it. It runs from AC power.View Prices on AmazonView Prices on ReverbView Prices on ebayView Prices on Music & Arts
Check out the latest Sequential instruments on Amazon
Specifications
Form
Number of Keys: 37Key Weight: Synth
Key Size: Full
Touch Sensitive:
Aftertouch:
Sound
Number of Voices: 4Polyphony: 8
Sound Generation: Analog Prophet-5
Piano Sounds:
Real World Sounds:
Sounds Editable:
Accompaniments:
Extra Features
Recorder/Sequencer:Tutorials:
Communication
MIDI:USB:
Tablet Connectivity:
Power
AC Power:Batteries:
Audio
Speakers:Audio Out:
Audio In:
Pedals
Sustain Pedal:Soft Pedal:
Expression Pedal:
Release Info
Year: 2025RRP: $999
Description
Synthesis
- Two Prophet-5 lineage analog oscillators per voice
- All oscillators have simultaneously selectable waveforms, including the LFO
- Oscillator B supports low frequency modes for use as polyphonic LFO modulation
- Classic Prophet-style Sync
- Variable square wave pulse width per oscillator (PWM)
- 4-Pole resonant lowpass filter drawn from the Prophet-5, revs 1 & 2
- Filter enhanced with bass compensation for thick sounds even with high resonance
- Filter can be driven into self-oscillation with the resonance control
- Filter Keyboard tracking: quarter, half, full
- Feedback with an aggressive drive circuit for extra edge
- White, pink, and violet Noise types allow for greater sonic variation
- Four-stage (ADSR) filter envelope generator for tone shaping and assignable modulation
- Four-stage (ADSR) Amp envelope generator for volume shaping
- Velocity modulation of envelope amounts for dynamic performance
- One global LFO for creating movement in the sound
- Seven LFO wave shapes: sine, sawtooth, reverse sawtooth, square, S/H (sample and hold), Noise, and DC
- LFO can synchronize to tempo at different step values
- Four LFO wave shapes can be selected simultaneously for complex modulations
Enhancements
- Up to six polyphonic aftertouch destinations selectable simultaneously
- Polyphonic aftertouch destinations: oscillator A frequency, oscillator B frequency, filter cutoff, amplitude, LFO frequency, LFO amount
- Pro-One style top-panel modulation matrix
- Two modulation buses with multiple sources and destinations and the ability to combine both buses at the destination
- Top panel modulation sources: filter env, oscillator B, LFO
- Top panel modulation destinations: oscillator A frequency, oscillator B frequency, pulse width A, pulse width B, filter cutoff, amplitude, LFO frequency, LFO amount
- Polyphonic glide (portamento)
- Unison (monophonic) mode with configurable voice count, from one to all four voices, plus chord memory
- Vintage setting recreates classic synth characteristics by adding voice-to voice variations in component behavior
- Arpeggiator with step sequencer mode
- Polyphonic step sequencer with up to 64 steps and rests
- Sequencer supports acid-style glide per step
- Sequencer can be used as a modulation source
Hardware
- Tactive™ 37-note slim-key keyboard with polyphonic aftertouch
- 100% analog signal path
- Intuitive, knob-per-function layout
- Spring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)
- Pro-quality, all-steel chassis
- 22? L x 9.88? W x 2.75? H (56.2 cm x 25.1 cm x 7.0 cm)
- Weight: 8.76 lbs. (3.97 kg)
Input/Output
- Main output mono (1/4” jack)
- Headphone output mono (1/4” TRS phone jack)
- MIDI in, out, and thru ports
- USB-C for bidirectional MIDI communication
- Footswitch/expression pedal input
- Pedal input also supports trigger and gate signals
- Separate power switch
- 12V DC 1.2A power supply, center-positive (included)
- Power supply 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
FAQ
What year was the Sequential Fourm launched?
This instrument was launched in 2025
What models did other manufacturers release in 2025?
- Alesis Recital Home
- Artesia Pro A100
- Arturia AstroLab 37
- Behringer Deepmind 12X
- Behringer Deepmind 6X
- Behringer MS-1 MK-II-GY
- Behringer MS-1 MK-II-RD
- Casio AP-265
- Casio CDP-S105
- Casio PX-765
- Donner DDP-50
- Donner DDP-90
- Donner DDP-90 PRO
- Donner DEP-08
- Donner DEP-16S
- Donner DHP-200 PRO
- Donner DHP-300
- Donner DHP-600
- Donner DP-100S
- Donner R300
- Donner S100
- Donner S200
- Donner S300
- Donner STARRYKEY-37 PLAY
- Kawai CX102
- Kawai CX202
- Kawai ES100
- Kawai ES110
- Kawai ES60
- Kawai ES8
- Ketron Fusion
- Korg B2+
- Korg E1 Air
- Korg Poetry Magnifique
- Kurzweil K2061
- Kurzweil K2088
- Medeli AKX10S
- Medeli DANTE-ZEN
- Medeli M331
- Medeli MK200
- Medeli MK300
- Medeli MK37
- Medeli MK49/BK
- Medeli MK61
- Medeli UP203/BK
- Medeli UP203/WH
- Medeli UP405E/BK
- Medeli UP405E/RW
- Medeli UP405E/WH
- Medeli UP605/BK
- Medeli UP805/GBK
- Medeli UP82/BK
- Medeli UP82/WH
- Nord Organ 3
- Roland LX-5
- Roland LX-6
- Roland LX-9
- Roland V-STAGE 76
- Roland V-STAGE 88
- Roland XPS-10X
- Roland XPS-60
- Yamaha MODX M6
- Yamaha MODX M7
- Yamaha MODX M8
- Yamaha P-143BT
- Yamaha P-145
- Yamaha P-145BT
- Yamaha P-223
What other synths were released at a similar time?
- Arturia AstroLab 37
- Arturia AstroLab 61
- Arturia AstroLab 88
- Arturia MatrixBrute Noir
- Arturia MiniFreak Stellar
- Arturia PolyBrute 12
- Arturia PolyBrute Noir
- Behringer Deepmind 12X
- Behringer Deepmind 6X
- Behringer JN-80
- Behringer MS-1 MK-II-GY
- Behringer MS-1 MK-II-RD
- Behringer MS-5
- Behringer WAVE
- Frap Tools Magnolia
- Ketron Fusion
- Korg KingKORG NEO
- Korg Krome EX Copper
- Korg microKORG2
- Korg microKORG2 MBK
- Korg microKORG2 MWH
- Korg minilogue bass
- Korg modwave mk II
- Korg multi/poly
- Korg Nautilus AT 61 key
- Korg Nautilus AT 88 key
- Korg Nautilus AT Gray 61 key
- Korg Nautilus AT Gray 88 key
- Korg opsix mk ii
- Korg opsix SE
- Korg opsix SE Platinum
- Korg wavestate mk ii
- Korg wavestate SE
- Korg wavestate SE Platinum
- Kurzweil K2061
- Kurzweil K2088
- Medeli AKX10S
- Modal Electronics ELEMENT One
- Nord Electro 7 61
- Nord Electro 7 73
- Nord Electro 7 HP
- Nord Piano 5 73
- Nord Piano 5 88
- Nord Piano 6 73-key
- Nord Piano 6 88-key
- Nord Stage 4 73
- Nord Stage 4 88
- Nord Stage 4 Compact
- Roland E-X10
- Roland FANTOM 6 EX
- Roland FANTOM 7 EX
- Roland FANTOM 8 EX
- Roland JUNO-D6
- Roland JUNO-D7
- Roland JUNO-D8
- Roland JUPITER-Xm
- Roland V-STAGE 76
- Roland V-STAGE 88
- Roland XPS-10
- Roland XPS-10X
- Roland XPS-30
- Roland XPS-60
- Studiologic Numa Compact SE
- Studiologic Numa Compact X SE
- Studiologic Numa X Piano GTSE
- Waldorf Quantum MK2
- Yamaha CK61
- Yamaha CK88
- Yamaha Genos2
- Yamaha MODX M6
- Yamaha MODX M7
- Yamaha MODX M8
- Yamaha MONTAGE M6
- Yamaha MONTAGE M7
- Yamaha MONTAGE M8x
- Yamaha PSR-SX620
- Yamaha PSR-SX720
- Yamaha PSR-SX720+
- Yamaha PSR-SX920
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Purchase Links
Buy the Sequential Fourm on Reverb
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More Info
- Manufacturer Product Page: https://sequential.com/modern-analog/fourm/
- Article Page: https://pianoandsynth.com/sequential-fourm-affordable-100-analog-synth-launched/
