JHS Pedals Fumble JFET Boost Effect PedalOops! JHS made an uh oh, but this mistake is anything but. The Fumble JFET boost effect pedal delivers a tone accidently introduced in their NOTADMBL V1 pedal, now in a standalone enclosure that provides the long cloned history of a Dumble BBC 1 circuit that was actually sourced from a 1970s Barcus Berry piezo acoustic preamp. The history is messy, the reasoning is complicated, but the sound is superb. This two knob clean boost, inspired by a clone of