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  • Special Order

    GFI System Duophony Advanced Parallel Blender FX Pedal

    *This is a Special Order item that we order quickly and directly from our suppliers after your purchase and ship to you within 4-10 days.*

    Breathe new life into your existing pedals with the Duophony Advanced Parallel Blender from GFI System.

    In essence, you have the ability to blend two signals together to unleash new sonic landscapes.  The Duophony takes the classic Parallel Blender pedal idea and brings it into a newer context with modern features and an intuitive user interface.

    The Details
    • Special Order item
    • Expected to ship within 4-10 days
    • Effect: Parallel Blender
    • Made in Indonesia
    • True stereo on all (inputs, outputs, & FX loops) signal paths
    • Parallel or Series routing modes
    • 3 parallel blend modes : XY mix, Y plus [X], and X plus [Y]
    • 16 Presets
    • Fully adjustable dry signal level.
    • Phase invert function on loop X
    • Individual gain control for each loop
    • Bypass function with or without trails
    • Expression pedal and Aux switches control input
    • MIDI input
    • Full-featured modulation engine
    • Current draw : ~150 mA
    • 9VDC negative-center plug (power supply is not included). 
    Shipping & Returns


    • Free UK shipping from orders of £200 or more
    • Orders despatched within 1-2 working days
    • Always tracked worldwide shipping
    • Plastic free packaging as standard


    30 day peace of mind return policy, but please read our terms and conditions, returns and refunds policy before placing an order. 

    What Do GFI Systems Say?

    The GFI System Duophony is a mono/stereo parallel blender pedal of unparalleled depth and flexibility, allowing the user to blend two separate signal chains of any kind in myriad different ways.


    Its rotary touch slider mix control is both intuitive and eye catching, requiring but a swipe of the finger to tweak the blend ratio of Duophony’s X and Y loops.

    Each loop is further equipped with dedicated, easily accessible controls, including gain, dry level, phase, trails (for reverbs and delays), and there’s even an onboard modulation engine with its own expansive control set.

    Duophony offers three parallel blend modes for its loops, two routing options (parallel or series), and 16 presets organized into eight banks.

    Besides the touch slider on the face of the pedal, each of Duophony’s knobs is also a button, allowing quick access to any parameter while keeping the user interface clean and simple.

    Options for outboard expression, aux switching, and MIDI control round out Duophony’s exhaustive feature set, making it the ultimate effects blending workstation for the dedicated sonic adventurer.

    Hear the Duophony in action!