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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 2 responses by carlsbad

carlsbad's avatar
carlsbad
1,551 posts
 

Not hot at all for the amp you need to drive those speakers.

I have 5 tube amps. The smallest ones, 2 wpc EL84, is about 60 watts. My 300b is 150watts, my push pull KT66 is 180 watts. none of those heat up the room. these are measured numbers which are always much lower than nameplate numbers. Most people don’t understand this.

My push pull 6c33c is 400 watts. It does heat up the room.

You need 2 watts. make sure you choose a DHT SET or at least audition one.

Jerry

carlsbad's avatar
carlsbad
1,551 posts
 

A lot of the tube amplifiers mentioned in this thread are much more power than you need.  2 wpc will be enough unless you like concert volumes.  A 2 wpc tube amp will be almost no heat.

Also, my comments above are made without air conditioning.  I live on the california coast and don't have air conditioning.

Jerry

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