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Sequential Prophet X Synthesizer

8 Voice Stereo (16 Voice Mono), Semi-Weighted Keyboard


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Order now for delivery to you on Mon 22nd Aug 2022.

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SKU: DSI-2500

    Product Description

    The Prophet X marks a brand new world for the Sequential Prophet Series. A bi-timbral, 8-voice stereo (16-voice mono) synthesizer combining digital oscillators and high fidelity stereo samples, processed through stereo analog filters and the awesome sound and synthesis capabilities we all love and have come to expect on a DSI synth.

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    At the heart of the Prophet X is a new sound engine that powers two simultaneous 16-bit, 48kHz sample-based instruments plus two high-resolution digital oscillators with waveshape modulation — all processed through stereo analog filters.

    "The Prophet X brings a wholly new/welcome sound to Dave Smith’s lineup. Due to its flexible and open sample-based architecture and tried and tested synth engine, it can cover practically any sonic ground." - MusicRadar

    Expansive sample library

    To start you off DSI have created a 150GB sample library, created with acclaimed sound developers 8Dio. The library includes acoustic and electronic instruments as well as ambient and cinematic effects. In addition the Prophet X provides you with 50 GB of internal storage space so that you can load your own favourite samples and sample libraries.

    8Dio T8 Sample Pack

    In May 2019, sound developer 8Dio released the new T8 add-on pack for Prophet X / Prophet XL. As the name suggests, the samples included are based on the legendary Prophet T8 synthesizer, a flagship all-analog unit that's considered one of Dave Smith's greatest creations. For the new sample pack, 8Dio actually sampled Smith's own vintage Prophet T8 - the real deal! 

    • Over 3800 samples
    • 120 custom instruments
    • 32 custom presets
    • Sampled Dave Smith's own Prophet T8

    The 8Dio T8 sample pack is available from 8Dio's website for $48 - click here to find out more.


    To make these samples your own, the Prophet X offers a wide range of sound shaping tools including loop manipulation, sample stretching and the fantastic DSI envelope generatiors, LFOs, modulation matrix and more! The Prophet X has such a large pallette of sounds that it goes way past the average Synth. If you are a live keyboard player, sound designer or composer looking for a wide gamut of tones under one keyboard, the Prophet X is the ultimate, super flexible synth for you.

    The Prophet X features a premium-quality, five-octave, semi-weighted keyboard with velocity and channel aftertouch, an integrated power supply, USB support, and three OLED displays.

    OS 2.0

    In November 2018 Sequential debuted the Prophet XL and with it OS 2.0, which is available for download for all Prophet X owners and comes installed on every new model. OS 2.0 brings a load of new features to help make this powerful synth even more powerful. Features include:

    • 32-voice performance mode which doubles the polyphony for single instrument/oscillator sounds
    • Sampled instruments can now play in stereo when in 16-voice mode.
    • Arpeggiator/Sequencer MIDI out can now drive other sound modules
    • New "forward/reverse" looping modes
    • Ring modulation available as an effect
    • Hack and Decimate effects (bit/sample rate reduction) can now be modulated
    • Velocity/pressure curves, alternative tunings can all be saved per program
    • And more!

    User Sampling 

    Sequential have reserved a full 50 GB of space for user sampling, more than enough for the keenest sampling enthusiast. 

    Musicians can easily arrange their custom recording, creating their own one-of-a-kind instruments through cross platform mapping software provided by 8Dio. Once transferred, the sample can be processed using the full extent of the Prophet's abilities and effects. 


    • MIDI In, Out, Thru
    • USB MIDI
    • Sample import jack for USB Stick
    • Main stereo audio output: 2 x 1/4″ phone (TS, unbalanced)
    • Output B stereo audio output: 2 x 1/4″ phone (TS, unbalanced)
    • Pedal/CV: responds to expression pedals or control voltages ranging from 0 to 5 VDC (protected against higher or negative voltages.
    • Volume: responds to expression pedals or control voltages ranging from 0 to 5 VDC (protected against higher or negative voltages.
    • Sustain pedal input: accepts normally on or normally off momentary footswitch.
    • Sequencer: accepts normally on or normally off momentary footswitch to trigger sequencer playback.
    • Headphone output: 1/4″ stereo phone jack.
    Ollie Mason author picture

    Written by Ollie Mason

    Key Action
    Semi Weighted
    Key Size
    Full Size
    Number of Keys
    CV Compatible
    Trade Doubler Group ID
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    Here at Andertons Music Co. we believe that we stock some of the best musical equipment in the world. That's why we want to make it as quick and easy as possible for you to get your order, safe and sound!

    We offer a wide range of delivery options to help fit around your busy lifestyle without compromise. This includes free, named-day delivery for most UK postcodes on orders over £99 which are in stock, Saturday & Sunday deliveries, and competitive delivery rates worldwide.

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    Customer Reviews


    3 reviews





    Mr Tim Dale17th Jun 2021

    Amazing synth - such a rich analog sound (thanks to the filters as the oscillators aren't truly analog), but capable of such a diverse range of sounds thanks to the onboard samples. Very intuitive, a synth you can know your way round in minutes but spend years discovering its depths. Sturdy construction and a great keybed. Only downside - not cheap.

    Value 3Looks 5Durability 5Sound 5

    Mr James Ansell1st Jun 2021

    Value 4Looks 5Durability 5Sound 5

    Trusted Customer12th Mar 2021

    This is exactly what I hoped it would be. An analog-style power synth with sampler capabilities. The best sounding modern Sequential product I’ve played, and by far the most versatile for stage and studio. Also - if you buy before May 31st, you can get $300 vouchers from the 8Dio site! It’s portable but absolutely solidly built, the key action is perfect, and the panel interface is instantly understandable. Honestly - I haven’t been this excited about a keyboard since my first Nord - it’s like they’ve taken all the best bits of a Nord and filled it with Sequential magic. It also looks cool af in black!

    Value 5Looks 5Durability 5Sound 5

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