JHS The Fumble JFET Clean Boost Pedal

The JHS Fumble is a compact JFET preamp pedal born from one of the most unexpected stories in pedal history. Originally released by mistake inside the NOTADÜMBLË V1 kit, the circuit quickly earned praise for its rich, dynamic tone and was later launched as a standalone pedal. Based on a reverse-engineered Dumble BBC-1 preamp used by John Mayer, the Fumble delivers the touch-sensitive response, warmth, and harmonic character associated with legendary Dumble FET circuits. Offering boutique-inspired feel and amp-like enhancement in a simple, affordable format, the Fumble captures a unique piece of guitar history—combining vintage preamp character, musical clarity, and expressive dynamics in a pedal that's as intriguing as its origin story.

Features:

• Faithful recreation of the legendary Dumble BBC-1 JFET preamp circuit 
• Delivers rich, enhanced clean tone with amp-like warmth and clarity 
• Unique Input control simultaneously shapes bass response and input gain 
• Output control functions as a master volume/clean boost level 
• Ideal as a clean boost, buffer, overdrive enhancer, or solo boost 
• Tightens low end and improves articulation when pushing overdrives or amplifiers 
• True bypass switching for transparent operation 
• Compact pedalboard-friendly enclosure