I suggested the biggest subs possible, because I believe he thinks the size of the sub deter mains how low it's gonna hit, or how it's gonna sound, which it doesn't, it's all in how it's tuned. A 18 can hit higher then a 12 in the right box, and a 12 can hit lower then a 18 in the right box. That and it's gonna be real hard to do hair tricks with 2 12's. I have seen it done but not on 5k watts. And it was just an opinion, take it or leave it, if he likes. And this is why no one respects you j, cause you feel only your opinion matters, and your used to noobs taking what you say as fact. This is a open forum for enthusiast, if you don't like someone's opinion why not just read on and ignore it.