Hello, I am pretty much a newbie when it comes to car audio. I need to get some suggestions from h-t. Ok, I have a PPI Pro 12 (the old school flat piston) and i want to get a new box for it. Help me pick from these two.

http://www.crutchfield.com/S-B...osure
This one has 1.25 cu/ft of internal volume.

http://www.crutchfield.com/S-B...osure
This one has 1.75 cu/ft of internal volume.

Here is a picture of my woofer...


Currently I have a sealed box which isn't boomy enough. I would like to get a ported box. Help me out!!

 

how much cub sq. feet does the woofer's manual reccomend?

 

that's the problem, i don't have the manual anymore.