L7 15 box question

[Jasonsrtred]

I have 2 l7's and I have a avalanche I want to build a box for it. I love low bass. How do I figure the specs for a box to tune the box for low notes.

[Jasonsrtred]

I also would not mind making the box for only one 15 and pushing it to the max and having the other for back up when I smoke it

[Joe X]

For two L715s a 9 cubes net @33Hz, 125 square inches of port area on 2KW RMS will give you the low end you want.