Trunk box

[JoeK 10+ year member]

I can fit up to about 5.8 in mine based on trunk opening measurements

 

[THATpurpleKUSH 5,000+ posts]

I can fit up to about 5.8 in mine based on trunk opening measurements

then you should do a single 15 or 2 12s. The 12s will have roughly 10-15% less cone area than the 18, which isn't very much. You need to allow airflow around the box to allow the sound waves to pressurize the cabin. Just because you can cram something in that takes up all the available space, doesnt mean its a good idea.

 

[JoeK 10+ year member]

then you should do a single 15 or 2 12s. The 12s will have roughly 10-15% less cone area than the 18, which isn't very much. You need to allow airflow around the box to allow the sound waves to pressurize the cabin. Just because you can cram something in that takes up all the available space, doesnt mean its a good idea.

i wasnt OP btw, but i was thinking of buying dtroms hcca 12s and run a pair of them in about 4cuft 32hz