Anyone tried running PS Audio P-300 with no fan ?

As I suggested before: go ahead!
It's OK that a unit like a PowerPlant is running hot! Every Class A amp does, let alone tube gear. So I never understood the introduction of the fan at all, because if you intend to run high loads where cooling down might be a necessity, there is always the 500, the 600 and the 1000 PowerPlant. And sure Paul knows what he is doing which you can see taking a closer look to the housing which certainly IS a heatsink!

I got an aftermarked cooler. Not a Papst, which happend to backordered, but some chineese stuff. I took the most quiet I could find - 19dB. It costed 10$ in a nearby computer shop. I also got a manual speed controller, which added 5$ to the bill.

With the speed set to max, the cooler as efective as a PS Audio unit - at least judging from the temp of the housing. Plus, as expected - it is 10x more quiet !

I can stil hear it from my listening possition - but now barely. And when I want it to be DEAD quiet - I set the controller to min speed. At min speed, you can't even hear it at late night listening, with everything switched off in the house !

I estimate, that the air output at min is about 50% of the output you get when you set the controller to the max. The unit gets considerably hotter - but not excessivly so.

And since the the regulator came with 0,5m of cable - I placed it OUTSIDE the P-300 and can controll the fan on the fly.

Now I turn it down every time I listen to some music, and turn it up when I don't.

I couldn't be happier.

I have a ps 300 with multiwave. I purchased it new. I use it to power up my Samsung DLP rear 50", my Faroudja NRS dvi, and my Samsung Hi def receiver.

We placed the ps audio upside down and removed the fan. It has been like this for about two years now with no problems.