I have a Polk Audio center speaker(not sure which model,$200 price range). I've noticed that it can't handle bass very well. Even though I have my Center set to small on my Onkyo reviever, I still hear it distort when bass hits (noticeably on Jurassic Park and the opening theme to Tomorow Never Dies) What gives? It's rated down to 52 HZ, and I KNOW it's not my reviever, I hooked up another speaker to it. Any ideas?