Give it time & see what happens Jerry, these things do take a while to reach some kind of an equilibrium temperature.
There are a few similar Krell pre amps if I remember right, the version I used for a while had an inbuilt PSU, though some of them are external ;)
At the end of the day it doesn't matter as long as you are enjoying it :eyebrows:
If it runs cool all the better, it'll last longer :lol:

