Just bought a stereo system with 4 5.25" speakers and its powered by a 400 watt amp… It just plugs into your phone/MP3 player. Was curious if anyone has one of these and how they liked it? Also, main question is, how do I go about hooking it up? I have a moose racing roof on and hope this still fits? Plus don’t know about wiring… Does it hook to battery or what? I don’t have the slightest idea. Thanks