Well i got 3 12's sealed 3 jbl w12gti's running off a zapco 9.0 4ohm version and i will tell you what it so loud no i cant hear to well. On a side note i triple my raammat on rear deck and it still rattles I have no idea what to do about it if anyone has an idea let me know or i will just keep putting more layers. I wish i would of done ported but 3 12's sealed is loud enough, but i hear more rattle than noise and i got most of my car done alrdy. Sad thing is i still hear it so i will have to keep working on those spots i guess. But its a neat install i will have to post pics in the near future.
