The BD-2 Blues Driver is one of the earliest Keeley modified pedals. It is a wonderfully complex circuit that has many layers of tube amp simulation. It’s a Fender Super in a box essentially. It is dynamic and expressive and captures many tones that guitar players love. Fast forward 16 years and Keeley has added a germanium amplifier stage right after the tone stack to simulate a tube power amp section. If you have wanted the perfect combo of Fuzz and Overdrive, this is it! We’ve added a Germanium Fuzz to the JFET Tube Simulation! The result is a more aggressively voiced overdrive with a spongy compression and fuzz that only germanium transistors give. The Germanium Super Phat Mod – Hand-Built Edition not only has the perfect JFETs for tone, it has the attention to detail only a hand-built product can provide.