Hi Rick, don't you hate when that happens? It's always best to make one component swap at a time, so if you go wrong, it's a simple matter to change things back.
You said the amp is new, so I would start by trying a different amp and see if things change. Also, if you changed any interconnects or other pieces of gear then you should try swapping those items one at a time until you find the shrill-sounding component. If all your source components sound bright, then it's probably something in the back end of the chain. You didn't change furniture around or remove a carpet or drapes or anything like that, did you?
You said the amp is new, so I would start by trying a different amp and see if things change. Also, if you changed any interconnects or other pieces of gear then you should try swapping those items one at a time until you find the shrill-sounding component. If all your source components sound bright, then it's probably something in the back end of the chain. You didn't change furniture around or remove a carpet or drapes or anything like that, did you?