If you want something better than radioshack, don't get the quantums. Get some AQ HDC3s, they aren't too expensive when comparing their power handling to other subs in te price range, and they have been proven to hit good numbers. An AQ3500 would destroy a pair of the quantums. And what do you mean you would only have them working for the bass and not the music? Do you mean that it's an spl setup? And if so, it's pointless to upgrade your mods and highs. Your throwing words and info out that you don't know the actual meaning to. Please please please just read ALOT more. Oh, and I can assure you that you would hit higher than an 80db on a tl...