If you gave those 2 10w3v2 JL subs only 300rms for the 'TWO' of them and the enclosure being sealed,I'm sure you're not satisfied.If you were to give those subs 300 rms each as JL suggests,have them wired correctly,those w3's should be some hard hitting ,punchy,subs.A couple of years ago,I had a pair of 10w3-3-4's,the new kind, wired for 2 ohms in a vented box ,powered by a JL 500/1.They were loud and booming.My friend had the same set up except that he had the 12" version w/vented box,and an Alpine MRD1005 amp wired for 2 ohms[1000 rms @ 2 ohms].Needless to say,he did get lower and louder,but for the 10's,the 500/1 ,vented box..it was stupid loud.Mine was in a 02 Nissan Altima,His............an 03' Explorer.My bass was in the trunk,his,was rear firing in the cab.The SUV set-up's are usually much louder.My friend,the manager of San Diego Car Stereo,is running 2-type "R"'s,vented box in a 2003 Silverado extended cab,with the PDX 1000.1 /150x4,all type'R''s,co-ax's-components,he has the Alpine IVA 205 double din touch screen,plays dvd's,I-Pod,myself,a 2005 Alpine 9847,good solid unit,no screen or video.I like the way mine sounds better than the truck,the SUV also from the shop is louder than both of us.I copied my friends systems because they sounded great,installed.We all have Alpine PDX/ TYPE 'R' set-ups--SUV-4x4,and 4 door sedan.Loud,clean,all have amazing systems,all different---whatever you get make sure you give the sub enough power,or you will never be happy.Alpine50..