... sw 18inch sub woofer speaker manufacturers and suppliers in China, it is waiting for you to buy our low price sw 18inch sub woofer speaker ... of the box, and reduce coloration and appearance.SW Series with full-range use, in combination ... low distortionBuilt-in cooling systemHigh stabilityModelSW-118BType18 Inch Passive Sub woofer SystemFrequency response35Hz-150kHz ± 3dBPower Handing800W (RMS) 1600W ...