Boston Acoustics ASW250 250-Watt Peak 10-Inch Down-Firing Powered Subwoofer High-contrast finish with scratch resistant high gloss panels for stunning good looks Boston's BassTrac circuitry for more bass without distortion Advanced ceramic/glass fiber polymer woofer with Deep Channel Design (DCD) deliver more bass response from less amplifier power Acoustically tuned ports for improved low frequency response. Frequency Range: 28Hz  150Hz, +-3dB LFE and Line Level Inputs for connection flexibility