Three words come to mind when describing the effect of the Phatbass, bigger, "phatter" and bolder! The Phatbass pure vacuum tube overdrive is designed to enhance the low-end frequencies of the bass whether as a preamp in front of your rig, or directly into a mixing board. Softening up your signal and creating a pillow of girth around each note, the Phatbass will coax analog lusciousness from solid-state rigs.