Maxxsonics MX-1 Premium High-to-Low Level Converter Converts/filters factory speaker wires into RCA low-level signals to an aftermarket amp; High Level Inputs: Accepts all types of high-level input signals Parametric Bass EQ: Provides a wide array of subwoofer output signal shaping controls to enhance bass response and sound quality Clipping Indicators: Visual clipping indicators provide indication of damaging clipped signals to help protect the subwoofer and amplifier. Balanced Line Driver: Ultra-clean DIN variable high-voltage output drives mono amplifiers with BLD input; Bass Remote: Included bass remote featuring built-in clipping indicators allows direct bass control from in-dash or under-dash;