Works perfect sounds great Add some boom to your room Add serious low-frequency impact to your movies and music with Polk's PSW108. This powered subwoofer delivers solid, accurate bass thanks to its 50-watt RMS amp and 10" woofer. The cabinet is constructed from non-resonant MDF, and is reinforced with internal bracing for superior bass clarity. The PSW108 is a great way to round out a home theater system or add depth to your stereo music without breaking the bank. Flexible inputs and controls Polk makes it easy to integrate the PSW108 with your existing system. You can hook your receiver up to the sub either through the line-level or the speaker-level connections. The continuously variable low-pass crossover lets you dial in the sound to match the PSW108 to the rest of your speakers. And a phase switch lets you tweak the sub's output for more precise bass response. Product highlights: bass-reflex (ported) enclosure 50-watt RMS amplifier 10" front-firing driver Dynamic Balance polymer composite cone frequency response (-3dB): 40-160 Hz crossover: continuously variable from 80-160 Hz phase switch for more powerful and precise bass output auto on/off speaker-level and line-level inputs; speaker-level output black oak vinyl finish removable grille included 14"W x 14-7/16"H x 16-1/8"D