BBE BMAX Solid State Bass Guitar Preamp with Full-Featured Sonic Maximizer Full Function 4th Generation BBE Sonic Maximizer processor Solid-state, Class A/B front-end with interactive 3 band EQ and interactive bright switch Quasi-parametric mid-range EQ with 12db of boost or cut between 250 to 1000hz Electronically balanced DI output Inputs for both passive pickup and active pickup instruments