Boomster Mk 1

The Jam Pedals Boomster Mk 1 is a clean boost effects pedal designed to enhance your signal with transparent, high-headroom amplification. This mini booster pedal features a single external control and an internal trimmer, allowing for adjustment of gain and output level. The amount of clean boost is determined by the internal trimmer setting, with leftmost position delivering maximum clarity and minimal coloration. The Boomster Mk 1 is compatible with both electric bass and acoustic instruments. **Key features:** - Clean boost effects pedal with adjustable gain - Internal trimmer for output and gain control - Compact single-knob design - True bypass switching preserves signal fidelity when not engaged - Compatible with bass and acoustic instruments - Powered by standard 9V DC power supply