I bought my logitech 5.1 z506 surround more than a year ago. It all went perfect. Installed it, nice sound, pretty noisy. But now i have a big problem. Every time i listen to music and turn the volume up the subwoofer makes a noise, like the bass and some brrr noise *sorry can't describe it* And the whole Bass thing sounds awful. It was acceptable in the beginning.. now it gets worse and worse. I opened it, everything looks alright in the back of the subwoofer and inside of it. All cables connected, none of them burnt or something like that. Can someone help me? And i even uninstalled and installed the drivers. I can't listen to music with that brrrr noise. xD Thanks in advance.