Design Question

[the727kid 1]

Alright considering pickin up another sundown 3000, and it got me thinking of bigger subs. Anyways, how does subs up port back work in a trunk car? I have 2 15s now, and considering 2 18s, but the subs would have to be facing up for this to work.

[JimJ 11]

Are you concerned about your reading on a sensor or is this just for you?

[the727kid 1]

I don't care, I don't do competition, I just care about loudest to the ear.