Score the Polk Audio PSW505 12-Inch Powered Subwoofer (Single, Black) at Amazon for just $179.99, just $10 from its lowest historical price. Let's talk about value, guys. Let's talk about bang for your buck. Over 600 reviews give the PSW505 a near PERFECT rating of 5 stars. That's rare and worth notice, especially with an audio product, especially when on sale.