i have an HK AVR247, it has had a few problems in the past when running the ez set eq with sending only very high frequencies to my center channel even though the crossover was set to 40hz, thsi was resolved by reseting the receiver but returns whenever i dont set up manually. now everything sounds washed out, whether movies (voices are very hard to understand) and even music in 2ch doesn't have the same clarity and seperation it used to. highs and lows are still present but everything seems muttled out by the presence of mid level tones. it all sounds like a really loud tv with tons of bass now.

any ideas what this could be from? i doubt its hearing loss i'm only 20. i realize its not the most incredible system on earth but for my age and budget its kicks ass and i'm trying to get it back up to snuff. i'd much rather repair something than replace it.