When I got this and plugged it in to test it I thought the fans may be lacking in ability to move air but once I mounted them in my media cabinet I realized they work very well. My cabinet consist of a Power Conditioner, Receiver, Satellite TV receiver, PS3, XBOX 360, Wii, Apple TV, Wireless Router, and Modem. If I had more than one thing on at a time it would get very hot. Not since I installed these quiet fans.