Details With glued on the bottom, this subwoofer with a response of 20 – 200 Hz, produces a serious really deep. Cutting the frequency is adjustable between 50 ~ 150 Hz. The subwoofer frequency reproduces frequencies below the tight avoiding overlaps with the other baffles system. It can adjust the stage to 0 degrees or 180 degrees. The input is by RCA. The subwoofer sits on four legs. Active System with 20 cm (8 ") subwoofer with power of 200 W max. Subwoofer Speaker with lower for low bass reflex frequency resonance phase control design or cutting Adjustable for optimum quality.