Piano and Trumpet can sound bright

Could be some of the above (ICs, diffraction, room acoustics), but my main suspiscion is the aluminum tweeters. Miles' muted horn can be excrutiatingly sharp on some systems I've heard. I have't yet met an aluminum tweeter I've liked. But for a first try I'd contact Jim Goulding and order a pair of his anti-diffraction pads. They are inexpensive, and although might not completely alleviate your problem, may help a lot. He might even have a return policy.

Kimber and metal dome tweeters are not a match made in heaven. Change the speakers or go to a smoother cable.

Yep, tweeters and cables. Trumpet is quite bright by nature of its sound, but I know what you mean. And piano is not bright.

Hi,
Unsound, the jazz clubs I attend are`nt amplified and regardless of the players or seating the sound of the horns are as I described. Lucky me I suppose.
Best Regards,

Charles1dad, When I lived in NYC some years ago, I spent more nights than not in various jazz clubs for several years. I've heard many bright sounding trumpets and pianos. Sometimes that's the intent of the musicians. I stopped going for various reasons, but it's interesting that I stopped going just as more and more clubs started unnecessarily amplifying sets. I have a good friend that plays Trombone regularly and he often complains if has to play near the trumpet players.