a lot goes to size, no replacement for displacement plays in speakers too, had I to do it again I would have loked harder and found a box that holds 12's, I have 10's and kinda regret it. I have a JL audio 500/1 monoblock pushing 2 JL audio 10w3's.. loud ? sure. earthshaking ? no. current ideas include upping to the digital amp by JL the 750/1 that is an unreal amp. don't leave out the other speakers, factorys stink, and can ruin a good song any and every day of the week. I alo need to amp my doors to get the full effect, but the head unit does 25x4 so all it comes down to is money and time. spend the money one time is key.