I was just wondering. How much or what differnce does the volt rating of a HU make? I know the higher the volt that comes out of the HU, the louder the music plays. But I will like to get a professional response out of this. I.E. If I had an ideal system, lets say one 5-channel amp with all aftermarket speakers and sub. Will the system sound louder if I had an HU with 5v rating, or one with an 8v rating? I'm assuming that the quality build of the HU overall will make the difference at the end. B