Walrus Audio Badwater Bass Pre-Amp D.I. Effect PedalA true all in one, ready for action bass pre amp, the Walrus Badwater delivers on multiple fronts to create an overall heightened and enhanced bass tone experience. Optical compression, overdrive, and a four band EQ all come together in one pedal to shape your bass sound from several angles. An internal optical compressor is always active and puts itself first in the Badwater's signal chain. This always on function of the Badwater enhances your bass