3200W Active Front Loaded 18 Ported Bass Reflex Sub Woofer. ACTION-S118A is a high-power active subwoofer system that incorporates a 3200 Wpeak amplifier and 18LX speaker with a 3 coil and 20 mm winding depth, double layer and sandwich to boost system power, as well as a new forced convection circuit that that works to reduce the effects of voice coil heating.