Need help with box for L7 15 ported for chevy avalanche.

[BadRiverBass]

I need the measurements for a ported box for one L7 15. I work at a wood shop. I just want it sitting on the back seat 

But I need room for my kid car seat. Thanks! I listen to mostly rap some rock. I want it to slap. Maybe a mix of sq and spl 

But mostly I just want to beat the block lol

[ckeeler11]

How do you plan on securing the box?

[bmwking]

4 hours ago, ckeeler11 said:

How do you plan on securing the box?

half empty boxes of nails and screws plus some unspent airbag inflators just crammed in there.  about as safe as a back seat box

[reedal]

Don't put an enclosure on the seat. It's going to be a hazard to everyone in the vehicle, including the child.