High power sub amp

Those perfects have a power rating of 350 watts, and with that amp your sending about 300 to each of them... i know those speakers can take a little more than 350, but i dont think there will be much of a difference in output by getting a bigger amp without sacraficing the reliability of the subs

I'm with mikew here. If those 4 speakers at 1200 isn't enough for you I HIGHLY doubt another 800w will do it. Another 800w WILL NOT EVEN GAIN YOU 3db of MAX SPL. This is tiny. In fact, because of the MikeW's point, I doubt you'd even gain more than 1db. It will likely be inaudible. It would be stupid, in my opinion, to upgrade amplifiers for ~1db gain. If you want more SPL, I'm sorry to say, you're going to have to go to another level entirely. Another level as in completly different setup. You need more efficiency, more power handling capability, and more electrical system power output capability. We can help you with this, but I think you've maxed out your current design.New Project: 2003 Pathfinder

And to make more power, you need to give that amp more power, meaning one monsterous outlay of cash for 0 gauge power  / ground and fusing. If you want more output, look at the box design again, what kind of box do you have for these subs? Why not look at different subs and box over a different amp and power / ground wire? Top Secret, I can tell you but then my wife will kill me.

They are being run in a 4 cubic foot sealed enclosure. I am not saying that they are not loud enough, I was more or less exploring the possibilities of getting everything I can out of them. However, it appears that I currently am, and I will stick with this for now, or at least until I get some more cash. Thanks guys, you answered my question perfectly.

All 4 subs in 1 air chamber? humm, ,i guarantee you will gain some spl if you were to devide that box up giving each sub its own air space.2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

I have it in 2 chambers (2 cu ft each), and braced even more between the subs. The subs are 2 per chamber, with more internal bracing besides the box itslef. I have a CAD drawing of it if you'd like to see it...