Hate to throw in this tidbit after your awesome x250.8 purchase, but a very simple, and easy error for anyone to make, that could cause your issue, is if you have directional cables and just 1 of them is going in the wrong direction. The parasound is a good piece of equipment, but very detailed and tinnie compared to the x250, which is amazingly smooth compared to most any SS. I bring this up, because you mention still hearing grain on 60s recordings....sooo, it is possible that your ear is aclimatized to the reveal of the parasound, and you only think the problem is fixed with the pass labs because of how smooth that amp is...hearing is often just relative perception....take a peak at the directional arrows of all your interconnects and speaker cables. If you find 1 that is turned wrong, be prepared for your audio nirvana. If that is not a problem, then hopefully at the very least this comment might help someone else in the future that does make that exact mistake.
