This whole thread full of ..... could have been avoided way before.... See what a one track mind gets you? Everyone told you that something was wrong if you couldnt get that sub to have decent output.
Big 3 will not likely get you any noticeable gains on loudness unless your stock wire was 10 gauge or something... It mainly just keeps your equipment and car's electrical system healthy and prevents disasters waiting to happen. a 2nd battery will also help a little bit during prolonged bass sessions, you wont lose loudness etc... Overall electrical upgrades are necessary when you run past 1.5k of power.
Once you get a 3500 or a 4k amp to that sub, you'll see it wake up as well.