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Sequential Prophet-5 Synth

5-Voice synth used on the Stranger Things theme!




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SKU: SEQ-1000

    Product Description

    Please note: To buy expansion cards, you will have to purchase them directly from Sequential here. 

    The original Prophet-5 was arguably the most popular synth that Sequential ever produced. This analog poly synth left a truly unique stamp on the face of music and technology; it was a timeless piece of instrumental design. Now, to mark Dave Smith's 70th year, the Prophet-5 has been reintroduced for a modern-day audience. This faithful reproduction marks a return to the brand's origins - delivering the same authentic sound and road-worthy style that put the initial model on the map. 

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    Old-School Architecture 

    All three revisions found on the now legendary synth have been included: Rev1, Rev2 and Rev3. This has been made possible via genuine Curtis analog filters and VCOs, further bolstered via brand new 2140 low-pass filters (which were meticulously created by Dave Rossum). You can then swap between the contrasting filter designs using the dedicated 'Rev' switch. This use of genuine hardware offers a performance that mirrors that of the original.  

    Sturdy Backbone 

    A complete, five-octave, semi-weighted Fatar keyboard forms the backbone of the synth. It boasts MIDI, USB, Gate and CV ins/outs - offering a host of useful connectivity options. All of this is encased in a rustic-looking, sustainable walnut heartwood, providing a premium look that matches its premium sound and playability. The housing is has been finished using careful steel and hand-oiling techniques. 

    The Vintage Knob & Poly Mod 

    Part of the Prophet-5's initial intrigue was the almost random nature of the frequencies and response times of separate envelopes, filters, VCOs, and amplifiers from each voice. These were all sprinkled with a now instantly recognisable dynamic, warm and nuanced sound. As a result of this, Sequential decided to incorporate the 'Vintage Knob' in an effort to retain the very same character and feel. This knob can be used to select just how random you want your sounds to become. 

    Poly Mod also played a part when it came to the Prophets sound - so once again, Sequential have incorporated it here. Your modulation sources come in the form of Oscillator B and Filter Envelope. The destinations are the likes of Oscillator A pulse width, Oscillator A frequency and low-pass filter. This all allows for a depth and breadth of sound creation that is almost mind-boggling. 

    Shape & Program 

    Moulding your ideal sound is made easy via simple programming functions. This is done through the knob-per function front panel - which offers a streamlined, hands-on layout for intuitive tonal crafting. With 200 rewritable programs (encompassing the same 1978 40-program suite which was used on a multitude of hit tracks and film soundtracks) and 200 permanent factory programs, there's plenty of scope here for serious creativity. 

    Modern Additions 

    Even though the aim of the Prophet-5 was to faithfully recreate the original model, Sequential have included a few updated features to suit the needs of the most discerning modern-day synth enthusiast. Aftertouch and velocity sensitivity provide you with far more expression. This wasn't possible with the classic Prophet. From LFO mod, to volume changes and filter sweeps, you've got even more options and avenues available to you than ever before.  

    NEW: Operative System 2.0 upgrade and Voice Expansion Card 

    Sequential have just announced a new OS update that broadens the sonic horizon of the Prophet 5. You will need the easy-to-install voice expansion card available at Sequential to increase your Prophet's polyphony to 10 voices, in order to benefit from OS version 2.0. This update will allow you to stack two programs to create more complex soundscapes. Each program is allocated 5 voices of polyphony, allowing 5-note bi-timbral operation. Alternatively, you can split the keyboard into two separate performance zones, each with a different program.



    • Two authentic CEM 3340 VCOs per voice
    • Simultaneously selectable wave shapes. Oscillator A: sawtooth, pulse. Oscillator B: sawtooth, triangle, pulse.
    • Pulse width per oscillator
    • Hard sync: oscillator 1 syncs to oscillator 2
    • Low frequency mode (oscillator 2)
    • Keyboard tracking on/off (oscillator 2)


    • Oscillator 1 amount
    • Oscillator 2 amount
    • White noise amount

    Low-Pass Filter 

    • Four-pole, resonant, low-pass filter per voice
    • Switchable between authentic versions of the Prophet-5 Rev1/2 filter and Prophet-5 Rev3 filter
    • Rev1/2 filter is a Dave Rossum-designed 2140, the modern counterpart of the original 2040 filter found in the Prophet-5 Rev1 and Rev2
    • Rev3 filter is a Doug Curtis-designed CEM 3320
    • Filter can be driven into self-oscillation with the Resonance control
    • Keyboard tracking: off, half, full

    Filter Envelope 

    • Four-stage (ADSR) envelope generator
    • Velocity modulation of envelope amount

    Amplifier Envelope 

    • Four-stage (ADSR) envelope generator
    • Velocity modulation of envelope amount

    Low Frequency Oscillator 

    • Three wave shapes: sawtooth, triangle, square. All waveshapes can be engaged simultaneously
    • Both Initial Amount and mod wheel control
    • Mod destinations: oscillator A frequency, oscillator B frequency, oscillator A and B pulse width, filter cutoff

    Poly Mod 

    • Sources: filter envelope and oscillator B
    • Destinations: oscillator A frequency, oscillator A pulse width, filter cutoff

    Vintage Knob

    • Recreates the characteristics of various Prophet-5 models by varying the behaviour of oscillators, envelopes, amplifiers, and other parameters. Go from a very stable “4” — as in Prophet-5 Rev4, (the new version) — all the way to “1,” as in Prophet-5 Rev1, the rarest and most temperamental of all Prophet-5s.


    • Channel (mono) aftertouch 
    • Destinations: filter cutoff frequency, LFO amount

    Performance Controls 

    • Full-sized, semi-weighted, premium Fatar 5-octave keyboard with velocity and aftertouch
    • Mod wheel
    • Spring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)
    • Polyphonic glide (portamento)
    • Unison (monophonic) mode with configurable voice count, from one to all five voices (10 voices for Prophet-10) and key modes
    • Preset switch: when off, the front panel is live; what you see is what you hear

    Patch Memory 

    • 200 user and 200 factory programs in 5 banks of 40 programs each
    • Direct program access, including Prophet 5-style single-button access to the current set of 8 programs


    • Mono output (1 x 1/4” phone jack)
    • Headphone output (stereo, 1/4” phone jack)
    • MIDI in, out, and thru ports
    • USB for bidirectional MIDI communication
    • Control voltage in/out (1 x 1/4” phone jack) 0- +5V input/output signal. Configured for 1-volt-per-octave operation.
    • Gate in/out (1 x 1/4” phone jack). Accepts a 1.5 to 15-volt on/off signal to gate the envelopes of a single voice on the Prophet-5. Outputs a 15-volt on/off used to gate the envelopes of an external synth.
    • Low-pass filter cutoff expression pedal input
    • Volume expression pedal input
    • Sustain footswitch input


    • IEC AC power inlet for internal power supply


    • 37.5” L x 16.4 W x 4.9" H (95.25 cm x 41.6 cm x 12.4 cm)
    • 31 lbs (14.06 kg)
    • Roadworthy all-steel construction with premium black walnut heartwood body and trim

    Written by Will Brook-Jones

    Key Action
    Semi Weighted
    Key Size
    Full Size
    Number of Keys
    CV Compatible
    Built-in Effects
    Keyboard Type
    Trade Doubler Group ID
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    Customer Reviews


    11 reviews





    Trusted Customer25th Jan 2022

    It’s a Prophet 5 - so I’m not sure I need to say anything more, other than that the Rev4 is everything it should be as a contemporary version of the Prophet 5.

    Value 5Looks 5Durability 5Sound 5

    Mr Philip Snowden29th Aug 2021

    Value 4Looks 5Durability 4Sound 5

    Mr Liam Boyle30th Jul 2021

    Value 5Looks 5Durability 5Sound 5

    Trusted Customer25th May 2021

    Value 3Looks 5Durability 4Sound 5

    Mr Clive Aitkenhead25th May 2021

    I have wanted to own a Prophet 5 for the last 40 years and the P5 sounds as good in reality as it did in my imagination.

    Value 4Looks 4Durability 4Sound 5

    Trusted Customer23rd Mar 2021

    Amazing! A must buy for your studio

    Value 4Looks 4Durability 5Sound 5

    Trusted Customer23rd Mar 2021

    Value 4Looks 5Durability 5Sound 5

    Mark15th Dec 2020

    It’s a Prophet 5 it was never going to be anything other than 5 stars

    Value 3Looks 5Durability 5Sound 5

    Mr Stuart Dunn11th Dec 2020

    Value 4Looks 5Sound 5

    Trusted Customer11th Dec 2020

    It’s expensive, but it’s more than a musical instrument and worth having it at home!

    Value 5Looks 5Durability 5Sound 5

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