would this work?

[420c]

I meant more like bringing 30hz from the (-6/-12) slope closer to 0 so its more of a flat response not adding gain (+6db/+12db) from an actual bass boost. It would be to make up from the loss of not going ported because of the space limitations but no worries. I would like to see some picks when done though i told a buddy who has a dodge ram he should do a box like this cause he doesnt want to give up the back seat but still wants to run 1 12.