Cool it!

Kijanki, they are the ones. I have 3, 2 in 1 rack and 1 in another. I got the ones with the lcd display, the T8 series. All are quiet and components are cool. My region in Aus can get to 43C but we average 34C over summer (32C inside). Components never overheat. 🇦🇺

Which Krell do you have. I have the KSA-80B and while it runs warm, it does not get hot. Perhaps refer to the owners manual and see what they reccomend for a temp. Does it trip the fail safe? I drive my one Ohm Apogee Scintillas and I have never tripped the saftey. It might be that your amplifier needs to have its bias adjusted, or perhaps its time for a tune up. I had mine rebuilt at the Factory about a year ago. You might also call Customer Service at Krell and ask them.  

Mr.bailyhill,
It's a pandemic project and my first experience with class A amps.
I aquired the Krell FBP 400cx stereo amplifier. I'm in the process of  preparing my electrical requirements for proper placement and operation. All this before I enjoy blowing my walls out. I like to take informed steps  from  everyday users. 

Thank You for your input! Be well..

Put the amp in a refrigerator, drill holes for the cables and power cord, and place the refrigerator on springs. Problem solved! 🤗

1 1/2” piece of granite placed as to not block the vents. Conducts some heat and helps with vibration maybe.

I do not use any kind of cooler on my two-channel analog system, even with its 100wpc tube amp. It's just not needed.

However, I found that modern multi-channel AV processor/receivers certainly are in need of additional cooling (mostly due to the A/V boards, I think) so I utilize a Cooler Guys twin fan cooler on top of my Integra receiver that draws the hot air up and out of the unit and allows it to run much cooler after a double feature movie night in my HT room.