I am an acoustical engineer with a background in sound propagation and electronics engineering degree. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I believe I know what I'm talking about. Yes, you are right, the alternator is very important in supplying the audio system and the batt is there for off and acc supply, but the batt is and can be used for backup supply for voltage drop. Having a batt with a higher ah will allow more wattage to supply the system as you have to account for total usable system wattage, and since wattage is a power function, it is directly related to the other factors of ohms law. Every component is important. But yes, upgrading the alt is one of the first thing I would do as well though, hate to say it bettr, but that is a good choice in any system if you plan to run it all out when the vehicle is charging. You both are right to a point. One of you is concentrating on the batt and the other alt. They are both important. But to go with bettr and paper, listen up....the only time you should worry about the alt, is if youu try to overrun the "circuit". Matching the amps output capabilities in your electrical system as a whole is just as important as matching resistance values. Because yes,the alt will only supply so much and look for backup and if its not there, well you know. So, simply put, match it. Don't exceed it. And you should never have problems electrically with amp draw or v drop. Its those who try to run a 5kw amp on a 105a alt and a factory batt that will experience issues in the long run likely. The amp will try to draw more than it can....something will go. Same concept with overpowering a sub...as it, the load, is part of that circuit as well. You both have a point.
