Hi, i bought two used infinity subs with a kenwood 800watt amp.. the subs came in a 9x12x12 box, or .75cubic feet for each speaker. The box dosent fit behind the seat in my 86f250 reg cab, so I used some math from school and designed a triangle shaped box that has roughly .75 cubic feet of air. I'm making a run to home depot in a little bit, so what type of wood should i buy, and what type of sealant should i put in between the wood?

My box dimensions are 6" on the bottom, 17" tall and 35" wide and a 2 inch flat spot on the top ,it should fit perfectly behind the seat and allow me to mount my amp on front

 

3/4" MDF (not particle board!) works well. Use plenty of liquid nails and wood screws. You can use silcone sealant to really make the seams air tight, but don't install the speakers untill the silicone is completely cured, the silicone fumes can eat through the speaker surround.

 

i agree with the liquid nails, or you can use PL400 .. basically the same thing just another type of construction adhesive.

Jason

 

I also use white calking (sp?) on the inside of my boxes to make sure everything's sealed. MDF, liquid nail, screws and calking or sealant. I personally don't use RTV cuz I can't stand the smell, but I know plenty of people who do w/o any problems.

 

I go a little overboard with my construction techniques. I lay down a bead of silicone on the mating surfaces, join the pieces, sink in drywall screws, and then lay down another bead of silicone on the seams. I make damn sure my boxes are airtight.

 

I got a tip to use Liquid Nails for the sealant if you're worried about silicone. I dropped a thick bead on all the joints, drywall screws, and then laid another thick layer on all the beads inside the box with Liquid Nails. Just like maticuno except I didn't use any silicone.

I also take it a step further and run a bead on all the outside joints to make sure all the seams are filled in and smooth them out with a putty knife. That way I know there shouldn't be any leaks on the box. Makes them rock solid too.

 

Liquid nails, and plenty of it.