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The power wire will not have any effect on it turning off and on, it just supplies power. You need three things: power, ground, and signal. The signal source is what will turn your system on and off which is where your remote comes in UNLESS you have a powered sub that has an auto-type turn...

It's pretty common with those types of powered subs for people to do fuse taps. I don't advocate it which is why I mentioned to him how easy it is to run power from the battery.

Running power from the battery is very simple, see pics in above post. Also, you may not have to run a remote wire since you're tapped into the speaker wires. If your sub is set to auto, it will sense the signal from the wires when the car is on (also stated in your manual). As far as the hum...

First off I'd like to thank Edwin for the great info and the subsequent contributors. This is my first post and I'd like to add that I too installed the Rockford Fosgate P300 10" sub and wanted to add some additional info in hopes it will help someone. This install was a breeze and here are...