Mine has a loud pitched whine that can be silenced when applying pressure on the outside body of the fan. That is an easy fix with some sort of dampening between the fan and case.
The issue that bugs me, is the howling noise of the air being drawn out. The fan is high speed. I leave my supplies on 24/7. I have become accustomed to my Tripp-lite's transformer hum. It comforts and lullaby's me. The howling... Nope, can't tolerate it.
My fix is going to be ghetto. I'm going to disable the internal fan, cut a hole in the case and mount an 120mm AC Infinity USB powered fan on it. It has an in line variable speed switch. On high speed, it's only 17 dBA. I can't hear it from 3 feet away. I use them on my amplifiers, sons Xbox and Playstation.
Unless someone has anecdotal evidence of a specific replacement fan that is super quiet, I ain't messing with trying to find one. I bought one of these types of supplies a few years ago. It wasn't as noisy, but it emitted tons of hash.
