ADAM Audio Sub12 12 Inch Active Studio SubwooferThe Sub12 is powerful subwoofer designed to extend the low frequency capabilities of any near or midfield monitoring and are ideal matches for ADAM monitors such as the AX or the SX Series. A large (2") voice coil is driven by a 200W Ice Power amp. This amp stays cool as it uses PWM technology in the amp and the power supply sections, producing > 90% overall efficiency, and can handle its maximum power without danger to the electronics or the driver.