Pricing and availability

We compare 600+ stores and found this item at 2 stores. Prices updated .

Reverb
4.0 (3)
$324.97 New
$233.00 Used
Thomann
4.5 (4)
$329.00 $328.00 $1.00 · All time low

Average Price: $295

Standard/Professional

$100

$301+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 1 merchant for "GFI System Duophony Parallel Blender". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Unlock a new realm of sonic possibilities with the GFI System Duophony Parallel Blender. This innovative effects pedal is designed for both electric guitar and keyboard enthusiasts who crave versatility and precision in their soundscapes. With its true stereo signal paths, the Duophony lets you experiment with depth and width like never before, delivering a rich, immersive audio experience.

Harness the power of parallel or series routing modes to explore different signal pathways, while the three parallel blend modes allow for nuanced sound manipulation. The Duophony offers 16 presets for easily recalling your favorite settings, and its intuitive user interface ensures you spend more time playing and less time tweaking. With individual gain controls for each loop and a phase invert function on Loop X, you have complete control over your tonal landscape.

The adjustable dry signal level ensures your core sound remains intact, and the pedal’s bypass function with or without trails offers seamless transitions between effects. The Duophony is also equipped with a full-featured modulation engine, MIDI input, and expression pedal and auxiliary switch control inputs, making it a versatile addition to any rig.

Key Features:

  • Classic Signal Blender functionalities with modern features
  • True stereo on all signal paths
  • Parallel or Series routing modes
  • 3 Parallel blend modes
  • 16 Presets
  • 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
  • Controls: 2 x Rotary Touch Sliders, Loop Y and Loop X Multifunction Control
  • Push Buttons for slider function select
  • 2-Line LED display
  • Footswitches: A, B
  • Various input/output configurations including mono/stereo input and Send & Return jacks
  • Power supply via 9 V DC mains adapter (not included)
  • Dimensions: 120 x 97 x 55 mm

Note: Battery operation is not supported.

Product specs

Available since July 2023
Effect Types Blender

FAQs

What is the primary function of the GFI System Duophony Parallel Blender?

The GFI System Duophony Parallel Blender allows you to blend two different effects loops in parallel, giving you the ability to mix and match effects chains for complex soundscapes.

Can the GFI System Duophony Parallel Blender be used with both guitar and bass?

Yes, the GFI System Duophony Parallel Blender is suitable for both guitar and bass, offering versatile blending options for various instruments.

Does the GFI System Duophony Parallel Blender require a specific power supply?

The GFI System Duophony Parallel Blender typically requires a standard 9V DC power supply, which is common for many guitar pedals.

How does the GFI System Duophony Parallel Blender enhance a pedalboard setup?

By allowing parallel blending of effects, the GFI System Duophony Parallel Blender lets you create unique sound combinations, enhancing the versatility of your pedalboard setup.

Is the GFI System Duophony Parallel Blender easy to integrate into an existing pedalboard?

Yes, the compact design of the GFI System Duophony Parallel Blender makes it easy to integrate into most pedalboard configurations without taking up too much space.

Mark Johnston

Mark Johnston

The BEST Parallel Effects Blender! GFI System Duophony | Secret Weapons Demo & Review

Video thumbnail for The BEST Parallel Effects Blender! GFI System Duophony | Secret Weapons Demo & Review by Mark Johnston

The BEST Parallel Effects Blender! GFI System Duophony | Secret Weapons Demo & Review

Mark Johnston

Mark Johnston

Video thumbnail for GFI System Duophony: Parallel Blender Pedal by GFI System

GFI System Duophony: Parallel Blender Pedal

GFI System

GFI System

Video thumbnail for GFI System Duophony Signal Blender / Guitar Pedal Demo by Demos In The Dark

GFI System Duophony Signal Blender / Guitar Pedal Demo

Demos In The Dark

Demos In The Dark

Video thumbnail for Running your pedals in PARALLEL is MAGIC! // GFI Duophony Signal Blender by gearfever

Running your pedals in PARALLEL is MAGIC! // GFI Duophony Signal Blender

gearfever

gearfever

Video thumbnail for Exploring Parallel Effects Chains with GFI System Duophony by ambienttrash

Exploring Parallel Effects Chains with GFI System Duophony

ambienttrash

ambienttrash

Video thumbnail for GFI System: Duophony // Advanced Parallel Signal Blender by MAS Distro

GFI System: Duophony // Advanced Parallel Signal Blender

MAS Distro

MAS Distro

Video thumbnail for GFI System Duophony Stereo Parallel Mixing Amp Tones by GuitarPedalHub

GFI System Duophony Stereo Parallel Mixing Amp Tones

GuitarPedalHub

GuitarPedalHub

Video thumbnail for GFI System Duophony | Incredible Parallel Routing Flexibility | Full Demo by Signal Path

GFI System Duophony | Incredible Parallel Routing Flexibility | Full Demo

Signal Path

Signal Path

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about GFI System Duophony Parallel Blender.

Features and functionality

  • The capacitive touch interface is innovative but reportedly impractical for live use due to its sensitivity to sweaty hands and potential durability issues.

    Source
  • The Duophony includes a touchscreen crossfader and a built-in LFO, enabling dynamic sweeping between effects loops A and B.

    Source
  • Offers trails/spillover functions, allowing seamless transitions between effects, enhancing live performance capabilities.

    Source
  • The Duophony's modulation can uniquely impact both channels, offering dynamic tonal shifts not found in simpler blenders.

    Source

Use cases and applications

  • The pedal is ideal for resolving phase issues when using pedals without analog dry-through or those that flip polarity, such as the HXFX and Ventris.

    Source
  • It can facilitate wet/dry/wet setups by operating stereo sends without returns, though it's considered overkill for this purpose without MIDI necessity.

    Source
  • The Duophony allows blending one channel into another, providing versatility for complex signal routing setups.

    Source

Comparisons

  • The Duophony is compared to the GigRig Wetter Box, which lacks MIDI and some routing capabilities but might suit simpler needs.

    Source
  • Compared to the OBNE and EHX blenders, the Duophony offers full stereo capabilities and a more comprehensive feature set.

    Source
  • Compared to the Tri Parallel Mixer, the Duophony offers stereo blending for two channels instead of three, catering to users prioritizing stereo effects.

    Source

User experience

  • Owners appreciate its MIDI capabilities but note the high cost as a barrier to acquiring multiple units for complex setups.

    Source
  • Some owners find the Duophony more powerful than necessary for simpler needs, which led to reselling for a more basic option like the Gigrig Wetter Box.

    Source

Value and pricing

  • Priced at $299 in the US, but European buyers face a higher cost of 350 euros, affecting perceived value for international users.

    Source

Based on 0 Reviews and 0 Ratings

5 star
4 star
3 star
2 star
1 star

Artist usage

Add artist
See how Rhett Shull uses GFI System Duophony Parallel Blender

Rhett Shull

Guitarist, Music Producer

...
Verified via YouTube

At 26:50 in this rig rundown with Premier Guitar, a Duophony Parallel Blender is seen on Rhett Shull's pedalboard. At 29:45 he says:

Another interesting pedal is the Duophony from GFI Systems. This pedal does not actually make sound. It's a stereo line mixer. So I have two pedals plugged into it, which is the Synesthesia from GFI and the Dark World from Chase Bliss, and throughout the show I'm using this to blend these two pedals together in different combinations and different sounds.

Album Usage

The GFI System Duophony Parallel Blender has been featured on the following albums:

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use GFI System Duophony Parallel Blender, it is most commonly used with the following gear.

RJM Mastermind PBC 6X
RJM Mastermind PBC 6X Effects Pedal Accessories
1
Lehle Little Dual II
Lehle Little Dual II Switch Effects Pedals
1
Strymon Zuma
Strymon Zuma Effects Pedal Accessories
1

More GFI Looper Effects Pedals

Community setups

Similar

Gear Guides