Originally Posted by defcone
I read somewhere that the port is stabilised, whereas when you run mod motors and solder fans soldered directly to battery terminals, the fan slows down when you apply throttle.
It's Rick Hohwart. I would go with what he's saying
I don't disagree there's probably some value in power stability supplied by a receiver, BUT i would like to share a problem I've recently run into with my rx-powered fan.
On my radiopost receiver, the fan turned out to be drawing so much amperage, it would inconsistently cause a total loss of control. I've since unplugged the fan and the problem went away. This didn't happen on my other car (which had a larger capacitor), so it was a pain to troubleshoot.
Direct hookup is definitely the way to go.