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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 soix

soix
10,016 posts
 

With your speaker’s efficiency you should take a hard look at Valvet Class A amps. They fly under the radar but get universally outstanding reviews and rarely come up for sale but there’s one available now. I’d highly encourage you to check them out. 

https://www.usaudiomart.com/details/649955814-valvet-e2-12-watt-single-ended-solid-state-amplifier/

I’d also mention the Plinius SA103 that is also Class A but includes a very useful low-bias switch that lets the amp run in a much cooler Class A/B mode for less critical listening or if you want to leave the amp on 24/7 so it’s always warmed up and ready to go when you want to do more critical listening in Class A.  Hope this helps, and best of luck. 

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