https://robertkeeley.com/Germanium+Super+Phat+Mod+-+Hand+Built+Edition 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. 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.