So here's what's going on. I'm having some trouble and I can't figure out what might be causing it. I have a Yamaha RX-V1900 with 5.1 Polk Audio. Recently I have been getting high amounts of distortion/clipping with vocals out of the center channel. I say center channel and not the speaker because I replaced the speaker and it carries over to the new speaker. I have tested it, and it only clips/distorts at volumes beyond -28 db. I usually watch movies at -18 db but the center can distort and crackle at points throughout the movie during dialogue. The thing about it also is that it will happen at the exact point at the exact time in each vocal. This made me think that the frequency or level that exact spot in the vocals is hitting, is more than what the channel can produce. If I rewind, it will happen like clockwork at the same spots. I'm stumped. Any Ideas would be greatly appreciated.