Seymour Duncan SFX-01

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This is a fairly simple booster with a resonance switch in front. The switch will drop the resonant frequency by 2-3 kHz in one position and 3-5 kHz in another. It's the resonance adjustment that I'm really interested in.

I haven't been able to find a schematic.

[Vince]

http://tagboardeffects.blogspot.co.uk/2012/12/seymour-duncan-pickup-booster.html

[Jon Rep]

Thanks Vince for the Link. I Built this boost and was very impressed by the full, rich tones it gives single coil pickups and I also tried it on Humbucker pickups. Great Stuff.