The thing about the K550 is that at first it sounds impressive because it's on the bright side of the spectrum, lending a pretty clear, open sound. Then you hear a trumpet and throw them off your head because that's definitely not what a trumpet should sound like.
Once, in a fit of insanity, I tried listening to Neph by Trombone Shorty with the K550 just to make sure I was hearing things correctly. Poor choice.