I suspect there is nothing wrong with your system. The ribbon tweeter is very revealing of source material and there are a good number of recordings out there that have tipped up treble and upper midrange responses. Your system could just be reporting the facts on the record. If this is the type of fatigue you are experiencing, then you should experiment with a high quality parametric equalizer with shelf controls. A broad 1 or 2 dB dip centered anywhere from 7 to 12.5kHz can do wonders for those overly hot sounding records.
You do hint at a broader question about music vs. audiophile effects. It's not always clear cut, but I've come to the conclusion that some of the qualities audiophiles strive for are not that musically important. I'd put much of soundstaging and imaging into that category.
You do hint at a broader question about music vs. audiophile effects. It's not always clear cut, but I've come to the conclusion that some of the qualities audiophiles strive for are not that musically important. I'd put much of soundstaging and imaging into that category.