KN,I think you've nicely illustrated a number of things with your post, thanks for that. It seems that consistent with my suggestion, for a free mid fi upgrade, a simple blanket may help the soundstage. But consistent with Steve N. and others, this doesn't really address the cause, and there may be other approaches that are better and more complete [and cost money]. It sounds like you chose some upgrades, and once you got a good sound stage the blanket actually detracted (as I think Steve N. would predict). Hopefully I've not mis characterized anyone here - if so its not intended. I appreciate everyone's comments here.