Fan on Amp Unbeatable

Go here:

https://www.acinfinity.com/

I’ve got a 5" side discharge on my tube pre-amp and it keeps it very cool. It has three speeds. On low you can hear it when you are next to it, but not across the room.

My SS amp has enormous heat sinks but I might put one of these on top of each one anyway.

The company makes thermostats for their fans as well.

I had an original Ampzilla with a noisy fan....turned the volume up.

“I have had several amps like the Krell KMA 100 that had fans you couldn’t hear”.

I still miss my KMA100s after all these years, my first true high end purchase back in the 80s

spinaker yes they were very special back then. Unfortunately those output transistors ran hot and many of them eventually blew their output stages. Like a light bulb turn them on and off a lot and eventually.....

Another idea to consider: take two of the largest diameter DC fans you can find, the larger the better. Wire them in series to a large enough DC wall-wart of the same voltage as just one of the fans and go for 50~100% over the current draw of just one.  Pad the bottom (intake) sides of the fans with soft weatherstripping foam to isolate vibration from the fans, and lay them over the top of your amplifier above the heat sinks. 

I did the above with an old receiver many years ago, and it kept the amplifier section from overheating, even when driving hard loads at high volume levels.