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Are there any tube amps that don't give off any---

HEAT!! 
I have a very small dedicated listening room, and so I was wondering IF there are any tube amps..I guess hybrid or all tube ( although more all tube)- that simply give off NO heat or very very little heat after full warm up. Since the climate seems to be getting hotter, it would be nice to have the benefits of a tube amp with no heat whatsoever. ( is this even possible?). 
Running AC isn't my preferred way of listening in a small room, so this question is now on my mind. I do not want to consider Class D solid state amps...as I know they are an option from a heat perspective...but just tubes.
128x128daveyf

Showing 2 responses by rodman99999

rodman99999
6,032 posts
 
The tubes our amps utilize are called, "thermionic" because their cathodes must be heated, to emit electrons.             Thus far; no one’s developed another method, regarding vacuum amplification/rectification (except, perhaps, Unicorn Audio).
rodman99999
6,032 posts
 
"I don’t think you are ever going to find an amp that runs totally cool.   There is electric flowing through it and that is going to generate at least a little heat"     Correct!      All gain devices will generate heat, while in operation (none are 100% efficient), but- not all gain devices are defined as, "THERMIONIC" (requiring some heat to operate in the first place).      The operating parameters of one’s gain devices and how much output power is being called for, will determine how much heat finally results (aside from a filament’s contribution), while signal is being amplified.      ie: Some tubed Carvers = cool enough to touch / some FirstWatt (Class A, SS) = too hot to touch (for the sensitive)
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