Faithful JFET preamp circuit recreation: Delivers authentic Dumble-inspired clean tone and classic preamp character
Dual control design (Input and Output): Allows independent adjustment of bass and gain for versatile sound shaping
True bypass switching: Maintains signal integrity when disengaged for transparent performance
Ultra-low 5mA current draw: Minimizes impact on pedalboard and power supply
Compact, durable enclosure: Ensures reliable operation and easy transport
Summarized by Shop
The Fumble exists because we made the biggest mistake in JHS history.
In May of 2025, we released the NOTADÜMBLË — our second solderless DIY kit pedal, containing two of the most coveted sounds from the Dumble universe. The overdrive side was correct: a boutique style overdrive built around the lead tone people associate with Larry Carlto
Circuit Type
JFET clean boost
Controls
Input (bass and gain attenuator), Output (master volume)
Switching
True bypass
Power Supply
9V DC center negative
Current Draw
5mA
Dimensions
1.96 x 3.93 x 1.21 in
Assembled in
Kansas City, USA
Summarized by Shop
4.9
33 ratings
5
4
3
2
1
This thing sounds amazing. I haven’t bought a boost pedal before. This is my first one and I feel like I waited for a good reason.
J
Joshua · June 16, 2026
Great pedal but the power jack doesn’t stay connected because the female input appears to be too shallow. So … wish it were greater. Fumble2