The Carl Martin BassDrive pedal is designed to add a warm “tube” sound to modern digital bass amps. Its Drive control blends an instrument’s tones evenly, rather than having them “sit on top” in a mix, and naturally maintains a full low-end response. It also has controls for Gain, Bass-Mid-Treble, and Level, and uses a regulated and switchable (115-/240-volt) power supply. Check it out at carlmartin.com.