Polk Audio PSW110 10-Inch Powered Subwoofer (Single, Cherry) 10" dynamic balance Composite driver cone delivers tight, musical bass Heavy-duty MDF enclosure is internally braced & damped 100W continuous/200W dynamic power amp Vented, down firing port improves bass response with lower distortion Life-, line- & speaker-level inputs A single 10-inch subwoofer with compression circuitry to limit distortion at earth-shaking volume levels Equipped with one 10-inch dynamic balance composite woofer driver Features laser-based Klippel measurement technology for improved linearity and deep, precise sound Frequency Response: 35Hz - 250Hz Peak power handling: 150 watts (60 watts continuous)