Could somebody tell me what the diameter of the magnet is on the 12" BTL. And, what is the mounting depth of the same sub is. And one more thing, if I build a box that is 5" at the top, 11" at the bottom, 20" tall, and 40" wide, will that be enough room to fit a 12" BTL with just cooling(will it be deep enough)?

Edited October 22, 200717 yr by Miles

That box won't be big enough period. You need a smaller sub or a bigger box.

My main question is is the box deep enough?

Mounting depth is listed on the site as 6 3/4"...magnet diameter is unimportant unless you're building a motor brace of some kind and you should have the driver in hand for that anyway...