wel 10 inchers are punchy but if you get the rite 12s thn blimy thy thump. I've got 2 12 pheonix gold comp subs nd a pheonix gold 800 monoblock. wiv a bass box adding 12 db. n i tell you what, thers not many installs round my way better in my opinion. and insted of goin for loudness id go for clarity, because if you dont by good stuff, it maybe loud but the sound quality wil b shite. nd I've done alot of installs so no what im on bout, sorry if i sound big headed but its one of the few fings i no alot about