Sequential Pro 3 (Deposit) Multi-Filter Mono Synth

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This is a deposit for the Sequential Pro 3 to reserve stock from our first shipment (expected late March).

This is a deposit for the Sequential Pro 3 to reserve stock from our first shipment (expected late March). The final price is £1459.00 - Once established we will confirm. Once Sequential confirm the first shipment date we will contact you to settle the remaining balance. The deposit is of course refundable should you change your mind!

Completing the trilogy – the third in the series

Sequential have long been a staple in the synth world, with the Pro 1 and Pro 2 mono synths revered as some of the most legendary synthesizers to ever grace the market. The Pro 3 (the third iteration) in the series builds on this legacy, with this new and improved synthesizer. Moving forward, Sequential has made the Pro 3 a mono/paraphonic synth, providing added versatility when it comes to sound design and expression. This opens up a whole new world of sonic power and flexible tonality.

The new and improved design allows you to choose between monophonic or paraphonic modes. The paraphonic mode allows you to play 3-note chords and provides further expression when it comes to modulation and effects. At the heart of the Pro 3 is the three-octave, semi-weighted keybed with velocity and channel aftertouch for maximum expression. The rear of the synth features a wide range of connectivity including a USB port, MIDI I/O, CV I/O and dual audio outputs.

Three powerful oscillators

Three is the magic number. The Pro 3 houses three powerful oscillators complete with three vintage filters and three LFOs. It combines the teaching of old-school analog synthesis with cutting-edge technology to achieve the perfect hybridisation between old and new. The synthesizer features two voltage-controlled oscillators and a third wavetable oscillator. The two VCOs provide classic analog warmth and grit, whilst the wavetable oscillator provides the punch and edge of the digital sound.

The wavetable oscillator is comprised of 32 tables boasting 16 waves each. The sonic possibilities are endless, allowing you to blend between waveforms and oscillators with the turn of a knob. It also features wave morphing and tuned feedback (with grunge). You can also texturise your sounds using the onboard analog distortion to powerful classic face-melting results.

A trifecta of vintage filters

Building on the two filter design of the Pro 2, the Pro 3 now has three classic filter types. The filtering is what set the Sequential Pro range apart from other synths. The filter gave it it’s unique and gritty character that made it so sought after. The first filter is a vintage 4-pole low-pass design, inspired by the Prophet-6 filter. The second is a classic transistor ladder filter, complete with resonance compensation you can use to retain the low-end punch.

The third and final filter is the legendary 2 pole, state-variable design, based on the filter found on the OB-6. This special filter can be continuously toggled between low-pass, notch and high-pass settings, as well as an optional band-pass mode. It also features an additional Drive control for adding more punch to your sound.

Expressive 16-track step sequencer

Take your performance to the next level. The Pro 3 employs a powerful and highly expressive 16-step sequencer. The versatile sequencer features 16 tracks, 16 steps and 4 phrases. You can input your sounds in real-time or via the step functionality, it also features variable gate and sequences lengths. The multiple playback modes further adds to its versatility, as well as the paraphonic operation.

High-grade effects, envelopes, LFOs and versatile modulation

The Pro 3 features its own dedicated effects section, providing premium-quality effects including delay, reverb, chorus, phasing, flanging and more. It also boasts four loopable five-stage envelope generators and three syncable LFOs with both slew and phase offset. You can creating evolving sounds using the full-featured arpeggiator and the 32-slot modulation matrix provides endless possibilities when it comes to crafting your sounds.


  • Three oscillators
  • Two analog, voltage-controlled oscillators
  • One DSP-based digital oscillator
  • Analog oscillators produce three classic wave shapes: (triangle, saw, pulse) with variable shape modulation/pulse width on each
  • Digital oscillator produce 32 digital wavetables of 16 waves each with wave morphing, plus classic wave shapes (sine, triangle, saw, variable-width pulse) and super saw
  • Digital oscillator 3 can function as an LFO for complex wavetable-based modulation
  • White noise generator
  • Hard sync, per-oscillator Glide, Oscillator Slop
  • 3-voice paraphonic mode with individually-gated envelopes per oscillator
  • Three filters
  • Three classic filter types
  • Filter 1 is a 4-pole, 24 dB per-octave, Prophet-6™ low-pass filter
  • Filter 2 is a classic, 4-pole, 24 dB per-octave, transistor ladder filter with optional resonance compensation
  • Filter 3 is a 2-pole, 12 db per-octave, OB-6™ state-variable filter. It can be continuously varied between low-pass, notch, and high-pass operation, with an optional band-pass mode
  • Three LFOs
  • Three syncable LFOs with phase offset and slew per LFO
  • Five waveshapes: triangle, saw, reverse saw, square, and S&H
  • Four envelopes
  • Four ADSR envelopes with delay (Filter, VCA, and two Auxiliary envelopes)
  • Envelopes freely assignable to multiple modulation destinations
  • All envelopes can repeat/loop
  • Feedback and distortion
  • Tuned feedback with Grunge for extra-aggressive tonal destruction
  • Programmable analog distortion
  • 32-Slot modulation matrix
  • 32 slot modulation matrix with over 46 mod sources and over 171 mod destinations
  • Modulation assignment buttons enable quick and easy modulation routing
  • Mod Matrix runs at audio rates
  • Four control vintage ins and outs and gate out
  • Four control voltage (CV) inputs and outputs for interfacing with modular synths and other CV-compatible devices
  • Parameters that can be sent to CV outputs include oscillators, LFOs, envelopes, sequencer tracks and any other source within the modulation matrix. Runs at audio rates
  • Gate Out for triggering external CV-compatible devices. Any CV in can be used as a gate input
  • Advanced sequencer with three modes: normal, gated, and trigger
  • 16 tracks and 4 linkable 16-step phrases
  • 16-track sequencer
  • Per-step ratcheting, duration, and velocity
  • Multiple playback modes: forward, reverse, forward/reverse, random
  • Supports real-time/step input, rests, and variable-length sequences
  • Syncs to MIDI clock and external audio and CV input
  • Sequences freely assignable to any modulation destination
  • Arpeggiator
  • Sophisticated arpeggiator with up, down, up+down, random, assign modes
  • Syncs to MIDI clock and external audio and CV inputs
  • Re-latching arpeggiation
  • Runs concurrent with Sequencer for arpeggiated patterns with parameter automation
  • Controls
  • Over 60 knobs and 70 buttons enable deep, comprehensive editing with minimal menu diving
  • Backlit pitch and mod wheels are easily visible in low-light situations and have a smooth, precise response
  • Independently adjustable upper and lower pitch wheel range
  • Position-sensitive latchable touch slider for enhanced interactivity and control
  • Full-sized, three-octave, semi-weighted keyboard with velocity and aftertouch

Technical Specifications

  • Memory: 512 user and 512 factory programs
  • Memory Options: Playlist mode for generating easily accessible set lists of your favourite programs
  • MIDI connectivity: 1 MIDI In, 1 MIDI Out, and 1 MIDI Thru/Out 2 port
  • USB: USB port for bidirectional MIDI communication
  • CV Inputs: 4 CV inputs (4 x 1/8″ jack) with -10v to +10v voltage range
  • CV Outputs: 4 CV outputs (4 x 1/8″ jack) with -10v to +10v voltage range
  • Gate Out: 1/8-inch jack
  • Sustain/Footswitch input: 1
  • Expression pedal input: 1
  • External audio input: 1 (1/4-inch phone jack)
  • Main stereo output: 2 (1/4-inch phone jack)
  • Headphone output: 1 (stereo 1/4-inch phone jack)
  • Power: 1 universal IEC AC power inlet for internal power supply (Operates worldwide on voltages between 100-240v, 50-60Hz, 30 watts maximum power consumption)
  • Keybed: Premium, 3-octave, semi-weighted Fatar keyboard
  • Dimensions: 26.5″ L x 13″ W x 3.5″ H (67.3 cm x 33 cm x 8.9 cm)
Model Name:
Pro 3 (Deposit)

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