I have seen some good looking and quiet 19' rackmount fans for computer servers or studio equipement. the nice thing is they have a power switch and come in 1U and up the nice thing is they usually multiple small fans so you can run them at low speed to get the noise down and still get good CFM. I see them on Ebay frequently.
Quiet fan to cool amp and preamp?
I have an Audio Research tubed preamp and solid state amp in a wall unit that is enclosed on 3 sides. Although there are no other components above or below each of them, they still heat up the cabinet quite a bit. There are about 6 inches of headroom above each component, and I can't increase it. I don't want to cut the back out either. I am looking for a relatively small and quiet fan that I can mount at the rear of the wall unit to circulate the hot air out towards the open front of the cabinet. Any suggestions? Thanks.