Hey all, I upgraded my speakers getting rid of the 7 year old factory ones. Great improvement but the volume won't increase on rides. I've checked the settings and speed volume is on. I tried each level. Im thinking the stereo can't output the watts needed. So I got a marine 4 channel amp ready to install. Here's the question... Where do I get my "rem" line from? The rest of power will be directly off the battery. Thanks on advance.