I’m putting together a 400w poweramp, built with a Hypex amp and a Smps module. It’s meant as a power amp to compliment my Pf-20t. The plan is to fit it in a solid aluminium housing that will also act as a cooling body for the amp module. I’m confident this will work for the amp, but unsure about the power supply. The supply depends on the air to cool it and the housing will be closed. It is a bit overspec for the amp and does not seem to be very sensitive to overheating. On the other hand it will be easy to create some vents or even install a fan. I kind of like the ‘beerproof’ specs of the housing, but can live without them. Does anybody have any experience with smps and DIY in this aspect? Do I need to add a fan to the partslist or is it safe to first wait and see how hot it gets? I bought most parts on the cheap except for the smps, so it would be a shame if thats the part that will fail on me.