I have four 12" eclipse single voice coils and I want to bridge them together so that I only have one -and one + connnected to the amp.(Only one wire going into each of the 2 amp terminals. It is a rockford 500.2 amp). I had it like this once and it hauled some serious a$$. I disconneced them all to carpet my box and wired them back up, but it wasnt as loud anymore.

From the back of the box this is what i have.

(+ -) (+ -) (+ -) (+ -)

-
+
AMP
-
+
If it is possible I woud like to bridge the outer subs together, b/c they are older and it was louder before when i had those to paired up.Thanks for you time guys.