Ideas for Krell-ish sound, but less heat?

Hello,
What class AB amps should a Krell-loving person consider? I have a 400 cx.

I have used a variety of nice audio gear over the years, and have gravitated towards the Krell sound. But in a room over the garage that already tends to get warm, the Krell's heat production is unbearable.

This hobby is all subjective of course. I like killer dyanamics, ballsy sound. Not interested in mellow or laid-back. As a comparison, I owned a Levinson 335 at one point but eventually decided the sound was boring to me. I'd love a multi-channel amplifier consistent with my sonic preferences, though I could also deal with combos of mono and stereo amps.

I have tried class D, but still looking. Ideas?