The RSX TypeS does not have a subwoofer in it. It is a powered woofer (referred to as a rich-bass driver), and is not intended to rattle the windows. It's a little amp and a 5" driver, for christ's sake. It is adequate for reproduction of normal music, but not bass heavy shake ya ass kind of stuff. The fix for the woofer can be found under the audio/electronics section of clubrsx. Do a search.