umm alot of guys that know spl know spkrman and what he did at the show (even though it wasnt big) was pretty impressive. basically in under a days time he flipped around his set up had nothing to test it with (his meter died) and busted a 150 without even knowing what his best frequency was. in another days time he could have made it prepared for either street b or c and im sure he could have done at least as good and probably better. basically he knows enough were he can get what he wants with little effort as opposed to alot of guys i know and if you want me to be honest for what you get even if he wanted to charge 400 per box per woofer it would be worth it. you might say "dang that is expensive" but from what other proven spl shops charge to get the same results and maybe worse costs alot more. does his box look as mean or weigh 360lbs? maybe or maybe not (depends on the vehicle) but the results are pretty unargueable. at most local comps his boxxes would net you a top 2 or 3 at least even if you live in hard hitter heaven.