i've owned both the #33 and the #33h in a relatively small room (12' x 18') with no air conditioning. the #33h's really don't get hot at all. the #33's do put off a fair amount of heat but less than any of the many tube amps i've tried.
neither the #33h or the #33 ever really get hot to the touch......thanks to the world's best (and most beautiful) heat sinks.
neither the #33h or the #33 ever really get hot to the touch......thanks to the world's best (and most beautiful) heat sinks.