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Boss BF-2 & BF-2B Flanger Plus Mod

Pedal Type

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First off, the pcb layout of the BF-2 and the BF-2B are exactly the same so this mod will work will either pedal. The BF-2 is a pretty good sounding flanger stock but it suffers from some nasty artifacts in the effect. The flange is just too metallic and boxy sounding. It also has a bit of hiss that can be quite annoying. But it’s still a very desirable effect. It is the same flanger used by The Cure, The Cult, The Police, and even Van Halen and Nirvana. It has a ton of potential for sure. This mod addresses the boxiness, hiss and the weirdness in the EQ and turns it into the effect it should have been to begin with. What you’ll get is a very lush, quiet, fat and warm flanger with some very cool effects that just sound awesome!

They will inspire you to play. I have been playing through one in tandem with my OD-308 and a modded CH-1. The tones are stunning! The vibe is reminiscent of the early Van Halen tones. Fat, thick and lush flange. Played through my Blackface Super Reverb and a Ibanez JS1000 you get this wall of sound that just seems to swim around in your head. Really inspiring to hear! With this mod you’ll also get a Bi-Color LED that will flash with the rate of the effect so you can glance at your pedal board and see the pedals flange rate. Plus it just looks cool. If you’re looking for nice, lush, full sounding flange this mod is your ticket!

NOTE: I include in the instructions how to convert the BF-2 from ACA 12 Volts to PSA 9 Volts. It is an option and you can certainly choose to keep the pedal 12 volts ACA if you like.

WARNING — I am unsure if there is more than one version of the BF-2. So just to be sure check that the pcb in your BF-2 looks like this.

Mod Options

With Cap Upgrade, Without Cap Upgrade


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Boss BF-2 & BF-2B Flanger Plus Mod
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