Well, I took your advice and decided to tighten the screws on the SC-V(s)and everything in the HT room ranging from the SC-IV(s) to the SC-I center channel. Some of the screws were very snug to begin with while others took a couple of rotations to tighten to a solid point. Putting on some high rez very familiar music showed the effort to be worthwhile. Not talking about an earth shattering difference, but observable.
Many thanks!!
Many thanks!!