I just bought a 18" FI BTLN2 and was wondering what is the best way to build my box. It is going in the back of a '97 nissan pathfinder.

I know you need 3/4" MDF for the box but can you use 1/2"?

thanks

Do not use 1/2" at all, especially on a beastly sub like the BTL.

Um, no, absolutely don't use 1/2". With a sub of that mass and power capability, I would use 1" mdf and a double thick baffle with either 1" dowel rod bracing or 2 by 4. My box is single thick 3/4" mdf with 3 layer face *top layer countersink for sub looks really clean* If you can afford it, and it'll save weight, use 3/4" Baltic Birch, it's much stronger and lighter than mdf. But no less than a double thick face and bracing would be necessary. Goodluck with the build and install man.

Ok thanks for the info!