Cool it!

DK....easy 'nuff with dc....;)

"Sous, sous, sushi...."

Sorry, old Tubes number....couldn't resist.  Spouse is hooked on 'food porn'....'Chopped', Beat the Flay, Wurst Kooks....all that....

"OK, 'chefs'....for our 'alien entre'....Open that basket....if you dare...."

*horrible screams and sound of crunching bones...*

"Well, I guess the chefs are on the menu tonight..."

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.  

+1 ericsch

I use the same thing and it works great.  Comparatively speaking, pretty inexpensive, too.

Play cool jazz. 

I use a single Cooler Guys fan 10” above PrimaLuma HP with KT120s. Can’t here it even when close. 
Had another kind but it made some noise.