GFI System Duophony Parallel Blender

Marsoni

M251S

$149.50

Get it in 3 business days with 1 day shipping. Friday, May 29

GFI System Duophony Parallel BlenderThe 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 Duophonys X and Y loops. Each loop is further equipped with dedicated, easily accessible controls, including gain, dry

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I haven't had a flat tire yet, so I also haven't had occasion to test these but they seem like great value for an extremely low price (especially versus a new tire.) I have handled them to try and gauge how quickly they'd smooth a hole, and they're rough / sharp and aggressive enough that I expect them to work quickly and well on not only tires, but on a variety of other materials. This pattern in particular should allow material to be shed and then passed backward pretty easily without clogging things up or slowing them down. If you've bothered to buy a patch kit for your tires, you really ought to have one of these around.

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Reviewed in the United States on January 18, 2026

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Don

San Leandro, US

★★★★★ 5

Thank you!

Size: 1/4-Inch - With Adapter

Thank you!

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Reviewed in the United States on April 27, 2023

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