Definitive Technology IW Sub 13" In-Wall Subwoofer Amplifier (iw-sub-a

Volume, Low-pass and Phase for unprecedented controlDial in your system your way with volume, low-pass crossover, and phase — all easily adjusted with convenient, front-panel control knobs.Two Amps in One to power two subsTwo discrete high-powered amplifiers with simple connections take deep bass impact to new heights.