With reference to "morbius's" response:
I was using the integrated KAV300i with Maggie 3.5R's and I could never arrive at a satisfactory treble level, even after adding attenuating resistors to the high freq. connections in lieu of the standard jumpers. Those ribbon tweeters, in combo with the Krell, set my teeth on edge.(And the input was from a Wadia 830, which is infamous for its high freq. rolloff!)
But, again, the integrated amps probably don't qualify as "real" Krells. I won't argue with that opinion, having never again bothered to audition Krell products.
I now have SoundLab A-3's, powered by Bryston 7B-ST's, fed by a Burmester 001, all of which I find extremely satisfying. I still have the Maggies and recently had reason to put them back into service temporarily. With the Brystons, they are still a bit bright, but nowhere near the annoying level created by the Krell.