My PV1 all of the sudden doesn't sound right. It sounds boomy if that's the right word. It draws attention to itself which is something that never happened before. I run Yamaha's auto setup again, i check the settings on the woofer but no difference. It's not as sharp as before, not as fast. Anyone any ideas what's the problem and what caused it? Is it me just imagining things? It's 8 months since I bought it. What should I do?