just wondering if my system (2x Audiobahn 12" 2000WRMS Quad VC off a Audiobahn A4KDN 4000 WRMS 1 Ohm monoblock in 5ci quad port box) would smash my mates system (2x 15" Rockford Fosgate T1s on a 1800WRMS RF Amp sealed 1.4 Ci boxes ea.)
Mine is setup for SPL. and his is just setup. lol. anyway i think he gets around 142 db. should i beat him? despite him having 2 larger subs... i have larger amp and better battery. my box is also larger... i haven't got mine db tested yet. should be finished within a month or two. but i would love to smash him with two little 12's... any opinions?

depends on the cars.
If one is a sedan and one a hatch, the hatch will have an advantage straight away.

Also depends how it your port is tuned.

When i first started competing.
i had 2 x 10's with 1.2kw (ported)
my mate had 2 x 10's with 400wrms (sealed)

because mine was tuned to low he beat me time and time again, until i got the tuning right.

Good luck when u do meter it. Post up some scores.