Best material to build boxes with?

To All.  Everyone is saying 3/4 MDF that's cool but the real question is what speakers are you going to use, What's the size 10s, 12s, 15s, 18s, 30inch what??????? . We all know MDF is the best but we need to know the speakers first and how many. VMAX and all that.

Julian59  

you can definately do that with fiberglass but really not neccesary. If you just build the box right to begin with, use silicone sealant on the inside, fiberglass coating is really not needed. Make sure to use wood glue. I recommend TightBond II brand woodglue b/c it is more resistant to moisture than Elmer's is.

One of the biggest problems that cause leaks is the cutout for the woofer. I have seen more boxes that have this problem (built by others of course) than I can count. Even I have had this problem a handful of times. The secret to doing this is just taking your time when cutting the hole out.