How hot is hot when moving from class a/b to to a or tubes?


I am considering moving from a class a/b Luxman L509x to a class a or tube amp. 
I have never owned a class a or tube amp, so have no experience of living with one. My kids are hopefully old enough and wise enough not to burn themselves, but I do live in an already warm house with bifold doors leading to a south facing garden. There is no escaping the sun, despite having uv treated glass. 
 
My room is roughly 9 meters by 12 open planed living space. Equipment is, Luxman L-509x integrated, Zu union 6 supreme, 99db sensitivity (this is why I am considering a lower powered tube I can barely turn the Luxman up) music is played roughly 6 hours a day, more on weekends  

who here has moved from class a/b and d to class a with or without tubes. What were the differences of things like:

warming up time 

additional heat to the home

Running in summer time 

additional cost to run

any considerations I should make before purchasing something. I will try in my home, but will need to free up funds 
 

 

mpoll1

Showing 1 response by pdspecl

I had a pair of Monarchy Audio se-100 Delux class A mono block amps.   They powered a pair of Usher floor standers.   Even at moderate volume the amps barely got warm.   Amazing amps for $900 I bought as factory refurbs/upgraded.    I once brought amps to my friends home to power a pair of Maggie’s.   The amps definitely ran hotter to the touch but not extremely hot.  So in my situation guess it depended on the speaker load