I would like a simple guide to this as well if it isn't too much trouble. Coming from car relays, it should just be a specific relay with correct handling capabilities, and a description of which of the 4/3 posts go to which power cable and the ground cables. Correct?
You can do a push pull amp rack and just wire the ground to ground and power to remote on the amp it won't hurt nothin and will turn off with the amp there's plenty power for that fan they only run off .5 amps your fine without spending money on a relay
Your stealing from a already low preout voltage in most cases that's a bad idea ..
