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Description
gfi pedals GFI System DuophonyDuophony is our take on the lowly 'parallel blender' pedal. We took the basic concept of blending two effects together to the next level by integrating the classic signal blender functionalities with modern features and intuitive user interface. The result is a solid blending machine, optimized to help you unleash the unexplored ideas of parallel blending and discover new ways of sculpting limitless soundscape! Full stereo signal paths Duophony
Duophony is our take on the lowly 'parallel blender' pedal. We took the basic concept of blending two effects together to the next level by integrating the classic signal blender functionalities with modern features and intuitive user interface. The result is a solid blending machine, optimized to help you unleash the unexplored ideas of parallel blending and discover new ways of sculpting limitless soundscape!Full stereo signal paths
Duophony features full stereo signal paths throughout. TRS jacks supports both mono and stereo connections for the inputs and effect loops, while dedicated Left and Right TS jacks are provided for the outputs.
Hassle-free blending with presets
16 presets, readily accessible via the two on-board footswitches, external aux-switches, and MIDI.
Expressive Flexibility
Adjust blending ratio or the Dry signal level at will with an expression pedal!
Fully configurable Heel and Toe values for flexible expressive control. Expression pedals with 10 KOhm pot value are supported.
Modulated Blending
A unique feature that Duophony has is “Modulated Blending”, the ability to modulate the blending action with an internal LFO. When modulation is activated, an internal LFO will produce a waveform whose shape maps directly to the blend ratio. Modulation speed can be controlled via expression pedal, tap-tempo, or MIDI clock.
Comprehensive external control
- Expression Pedal - with adjustable heel and toe values.
- Aux Switches - accepts up to 3 external switches for versatile control (tap-tempo, bank up/down, etc).MIDI In - nearly all features and functionalities of the pedal are opened to MIDI access, including MIDI clock.
Purity and Precision
100% analog signal paths, coupled with high headroom and low-noise design preserve your signals and tone.
Precise digital control provides seamless user interface and ease of use.
Features:
- 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.
Specs:
- Input impedances : 1 MOhm.
- Output impedances : 500 Ohm.
- Current draw : ~150 mA.
- Input / Sends / Returns jacks : 1/4 inch TRS.
- Output jacks : 1/4 inch TS.
- Expression / Aux input jack: 1/4 inch TRS.
- MIDI Input connector: 1/8 inch TRS.
- USB connector : Type C
- Dimension : 9.7 x 12 cm (3.8 x 4.7 inch)
- Power requirement : 9VDC / 150mA, negative-center plug (Power supply is not included).
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Quick and easy - nice pipe kit.
Size: 4-Tier (Not included planks)
Pair these with some shelving boards from your local big box store, and you're in business. These look nice, and are easy to assemble. I had them up and on the wall in about 90 minutes.
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Reviewed in the United States on January 7, 2026
★★★★★ 5
Sturdy, Be mindful if a few things in advance
Size: 5-Tier (Not included planks), Size: 5-Tier (Not included planks)
Good quality. The black pipe compliments our decorating style so we are over all pleased.
Be mindful of the following:
- Needs a little bit of expertise in making sure all the flanges line up and are level/plumb.
- Even if/when you pre assemble tubing according to printed instructions, the shelving won't line up and some connection parts will have to be loosened to line up.
- I consider us (me & the hubs) little above average when it comes to DIY but this took some figuring out and cooperation during installation because we decided to align the holes on the flanges up with our studs to enforce the holding strength (for weight of books and family photo albums/picture boxes). This choice was prompted by the poor quality of plastic drywall anchors included with the product.
Now that I have installed one, I will customize next time with more height (to accommodate taller children's books that don't fit the current set up) and a bit deeper (to accommodate a 12 inch shelf/wood insert). Aesthetically, it will not accommodate a book taller than about 9 inches. Our photo albums range up to 15 inches and because the shelving depth from back wall to front of wood shelf is about 12 inches, it hangs over the front too much to look balanced.
With the current set up, I'm limited with what can be placed on the shelves - size wise. While this does not have anything to do with the quality of the product, you may not know to consider these aspects in advance so thats why I include it in my review.
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Reviewed in the United States on July 13, 2021
★★★★★ 5
A Solid, Stylish Solution!
Size: 4-Tier (Not included planks)
I use this industrial pipe shelf setup in my salon to display and organize products, and it’s been a great fit. The hardware is sturdy and gives a clean, rustic vibe that works well with my space. It was easy to install, and I added my own boards to customize the look. The open design makes it easy for clients to see what’s available, and it’s held up well with daily use. A solid, stylish solution for keeping things neat and accessible.
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Reviewed in the United States on November 14, 2025
★★★★★ 4
Good quality
Size: 2Pack of 5 Tier (Not included planks)
Love this very easy to assemble the pipes are sturdy
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Reviewed in the United States on July 17, 2025
★★★★★ 5
Love it!
Size: 5-Tier (Not included planks), Size: 5-Tier (Not included planks)
Years later it is still holding up! Don’t mind the mess! Worth it! Good size! And once it was up it was easy to put together! Love the style!
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Reviewed in the United States on October 26, 2025