As far as entry subwoofers come, Polk Audio PSW10 is probably the best for your buck that you can find bar none, especially considering the quality of the build. Built around high quality medium density fiberboard and using a highly efficient 10" driver, thePolk Audio PSW10 manages to bang as well, if not louder, than other subwoofers in this category, despite running at 50 watts RMS. Polk Audio PSW10 have the sound quality is excellent, with very little distortion at high volumes above 50 hz or so, with full excursion easily being reached because of the ported design.
The PSW10 subwoofer fills in the bottom end of your home theater system, so your main speakers don't have to perform bass duty, instead having only to reproduce the mid and high frequencies. If you're looking for your first subwoofer, look no further than the PSW10. It's a great solution for completing your sound system and will take your viewing experience, movies, games and TV to a higher level of enjoyment.
Polk Audio PSW10 subwoofer is ideal for music and also Polk Audio PSW10 very beneficial to add it to any non-subwoofer setup, the 10" driver struggles to hit the low lows with the sound becoming muddied with deep, deep bass of any length. I found this to be a problem with all entry subwoofers I've tried, not just the polk, so take this with a grain of salt.