First off I was a member of this form in the past. I got alot of great info from it and no longer needed it but now I'm back with an issue. I am running a Pioneer Elite VSX-91TXH Receiver, a B&K AVH5125 amp, a Sony BDPS550 Blu-Ray player. Speakers are all Polk LSi in a 7.1 Setup and the Sub is a Velodyne DLS15. I am having this problem only on movies that are in Dolby TrueHD 7.1 sound. The problem is in all surround speakers and does not happen with 5.1 dolby trueHD. Any input will be greatly appreciated, Thanx in advance.