You said no fan, but, the one I would recommend does have a fan. However, it only runs when thermostatically required, which is not often. That amp is the Datasat RA7300. There are few 7 channel amps that will better your Krell. The ATI signature would be a close second. PM me if you would like pricing on either.
Looking for a 7 channel power amp to replace Krell showcase 7
I am using Krell showcase 7 now with good result in my HT. But the amp is like a grill during summer, it heats up my basement. There is also some reliability concern about this amp. I am looking for some 7 channel amp that is comparable to Krell to replace my showcase 7, which will not generate that much heat. I am using Krell S-1000 processor in HT setup with B&W 805 speakers. Balance input is preferred but not must. No fan in power amp please.