Eureka!

Jam Pedals designed the Eureka! to bridge two fuzz worlds: the singing, dynamic midrange of germanium circuits and the gritty, full-bodied character of Big Muff-style distortion. The result uses silicon transistors in a proprietary architecture that captures the best of both.

The three-way toggle switch is the secret weapon—it incrementally adds low-end, making it easy to dial in perfect response for single-coils, humbuckers, or boosting bass for solos. Push the Gain high with a strong input signal and the circuit delivers a satisfying gated-fuzz response.

Level, Tone, and Gain controls cover the basics. The Eureka! cleans up reasonably well with guitar volume adjustments, unusual for a Muff-style circuit. True bypass keeps your dry signal pristine.