Originally Posted by snobro1808

I calculated trunk space in my moms sunfire trunk and it came out to 16 deep 22 wide and 30 long, Get a calculator and that makes roughly 6.1. THen MINUS walls which Iwill be using 1" mdf. still comes out good pretty high. Thats without using any cabin space and leaving quite a bit of room for sub. If you want deep clean QUALITY sounding bass, go for a bigger box. If you want something for SPL then im sure you can do with smaller. I was thinking about taking out a round section in the middle area of the seat and vent into the cabin. Use WINISD its free, but may take a while to figure out.

Originally Posted by snobro1808

Bigger the box = smaller port needed to tune lower, cleaner deep bass QUALITY. Smaller = Boomier, bigger vent to tune lower, SPL. use WIN ISD if you dont already. its free and works great. Might take a while to learn how to use it though.

Originally Posted by snobro1808

Bigger the box = smaller port needed to tune lower, cleaner deep bass QUALITY. Smaller = Boomier, bigger vent to tune lower, SPL. use WIN ISD if you dont already. its free and works great. Might take a while to learn how to use it though.

Originally Posted by Father Yuli

u are wrong on some of the things you mentioned there.

i seen some pretty loud spl boxes that are 20-30 cubes in volume and that had HUGE ports.