N2 box size

[blakflash 1]

I'm trying to figure which I would be better off doing a 15" N2 in 5 cuft box after port displacement or a 18" N2 in the same size box and same power tuned to 32 hz. What are some of the opinions of what I would lose/gain over going with the 18 as opposed to the 15 other than more cone area? I was thinking I might lose a little low end and get higher box rise on the 18" but then again I'm not 100% sure. I'm doing a build on my friends car while he's away. the car is a 04 sebring convertible. As far as power goes it'll be 1.5-2.5k. Not sure what I want to go with yet as he is not a very responsible listener and I'm probably going to have to glue the gain down to keep him from messing with it.

[steveo50 3]

if he turns is past a point send 12v to his fingers

[blakflash 1]

if he turns is past a point send 12v to his fingers

Not a bad idea may just put a hot wire across the gain and bass boost knobs.

But back to the original question.....