Thank you. I have been looking for something similar as a solution to my very warm Pass Labs phono stage. My Pass amps are very hot too. They are all heavily biased into Class A and these fans are worth considering. I also wonder if cooling down the area around the components will in fact increase the bias as they adjust to maintain a temperature. Perhaps this will improve the sonics as I do think my system sounds better in the winter than it does in the summer when the room is really warm. When they say leave plenty of ventilation around these Pass components, they mean it.
Good Morning Peter, I had to move my Pass amp out of the open rack as it still needed more “room” to breathe.. They do get toasty.. Every amp is biased in a warm room for a few days by Pass so each unit is adjusted and sounds the same when it leaves the factory.. The heat is really controlled very well inside the unit, which is why the outside parts and heat sinks are So hot, efficiently removing heat from the internal components. The original Aleph amps heat sinks would turn bluish in color from heat, yet these amps were totally reliable even decades later. The only detriment is in 15 to 20 years, the caps will dry out and need to be replaced. Just the nature of the beast. I wouldn’t worry too much about reliability with their amps.. My pass preamp runs quite warm too, but all the specific internal components are overly heatsinked to handle and transfer the heat safely..
I built their Pass ACA amp and it runs really hot !! You can’t lay your hand on the heat sinks, So I backed down the bias of the output devices, it ran cooler but didnt sound good.. So I bumped it back as defined by pass and accept the fact that it’s designed to run hot..
port or wall socket.
