mijostyn
I am happy to report, my friend/neighbor/music producer and I listened for 4 hours and we could not entice the piano to sing.
we agreed with you, it must be doing something, but try as we may, could hear no sound emanating from it. he walked here, there, bent, stretched behind, ...
I thought, lets get blasting, and hit pause. the magnets stop the speakers rapidly, but the piano would keep singing. nope.
lucky is all I can say.
....................................
meanwhile, I had kept my tweeter's l-pads too low, he heard that readily, I adjusted, them speck by speck, he listened, then the slight compression he heard was gone, he pronounced the sound, imaging, depth excellent, and suspected when I checked the next day with the sound meter that I would find we raised the tweeters 2db.
sure enough, I simply perfected the Left tweeter's L pad a speck to match the right one with specific frequency bands from the GRP/Carver Test CD.
Listening a great deal the next day, I realized my mistake, and it's more than subtle effect.
While the meter was showing the level of the 16k band which I surprisingly heard, I thought, if I, 73 year old ears, can hear 16k, then it must be too high for Donna and younger ears. So, I lowered the L-Pad to reduce the tweeters (by about 2db is turned out).
What I didn't think about, didn't realize: the SPL I was hearing did not correlate to the SPL of the Meter. I heard 16k surprisingly well, but I think it is fair to say not as well as the meter.
Thinking/Listening the next day, duh, I wasn't just erroneously avoiding 'too much tweeter', I was causing some compression, because it reduced both the volume and time decay of the overtones of the upper mids.
The Eurythmics, Andreas Vollenwider, Blue Nile are full of splendid highs and the overtones of lower notes I had cut off.
What a gift to have my friends ears.