Well, at least I know a good amount since I do alot of research on google/SMD, I read people's results,but I don't know everything of course, I'm still learning(that's why I keep coming here, I do more reading that posting, and, I try to help with what I know though sometimes, even though I tend to post mostly on the off topic cause I'm bored a lot.), but everybody in my area keeps telling me that JL is the best, and sealed boxes sound the best,
I only have one friend who agrees with, and listens to me.
I'm just gonna let my friend make his mistakes by somehow fitting 4 W7's, 2 of them 12's, other 2 13's, in a Lancer, while keeping his backseats, with sealed enclosures probably powering each with a 750/1 cause he thinks RMS is maximum wattage, and can damage the sub if he feeds them their RMS, and then somehow be able to be loud enough to be heard from his house to my high school(that's 2 miles), while retaining perfect SQ.
I may be a beginner still, but at least I have common sense, and I listen to more than just one person for everything, like I'd definitely listen to what you guys have to say when I get stuck on or don't know something.