Second Hand Darkglass Electronics Microtubes B3K CMOS Bass Overdrive (no box) The Darkglass Electronics Microtubes B3K CMOS Bass Overdrive is a compact high-performance bass overdrive pedal designed to deliver tight, articulate saturation while preserving the fundamental character of the instrument. Known for its modern voicing and precise low-end control, the B3K has become a reference point for bass players seeking clarity and aggression without sacrificing definition. The CMOS-based circuit produces a dynamic overdrive with fast transient response and excellent note separation, allowing complex playing techniques and extended-range basses to remain clear even under higher gain settings. Its tonal character combines controlled low frequencies with present upper harmonics, resulting in a focused sound that cuts through dense mixes while retaining punch and depth. The B3K is particularly suited for modern rock, metal, and progressive styles where tight bass response and articulation are essential. Its transparent yet powerful saturation allows the natural tone of the instrument to remain recognizable while adding harmonic richness and dynamic edge.