I have used Krell Integrated amps for over 15 years in my two main stereo systems ( Krell KAV 400 xi and Krell S 550i). I have pushed Maggie’s with both integrated amps just fine and Maggies have to be the most inefficient speakers built. The sound I get is amazing - midrange, bass and imaging are the best I have heard. Just be aware Class A power runs hot! But it sounds great. Krell service was needed on my 550i and they were great! Go with Krell and you will be happy! I am!