4" muffin fans & a Variac to reduce speed & noise works great. But SCR-based motor speed controllers produce tons of noise so definitely avoid them. Fixed power resistors are another way to reduce voltage / motor speed.
Quiet fan for rack cooling installation?
I just bought a Plinius amp that runs very warm in class A. I have 6 inches of space above it and open sides and front in my rack, but the heat buildup is still immense. I'd like to install a small, silent fan in the rack to help keep things cool. Could you folks please make some recommendations based on your experience?
Cheers!
Cheers!