i was told by the local shop that if i plan to make a sealed enclosure for a 12" jL w7... i must get [3/4 x 2] which is 1.5inch thick MDF wood to build my enclosure?

 

Just get 1 inch MDF. That is more than suffucient for that sub. If you are doing a sealed enclosure, just make sure that you resin the inside of the box to prevent air leakage.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sopiwnykg &raquo;</TD></TR><TR><TD CLASS="quote">Just get 1 inch MDF. That is more than suffucient for that sub. If you are doing a sealed enclosure, just make sure that you resin the inside of the box to prevent air leakage.</TD></TR></TABLE>

i prefer using fiberglass resin (no glass) with a paint brush.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by unrefined7 &raquo;</TD></TR><TR><TD CLASS="quote">i was told by the local shop that if i plan to make a sealed enclosure for a 12" jL w7... i must get [3/4 x 2] which is 1.5inch thick MDF wood to build my enclosure?</TD></TR></TABLE> I would use 1" for the face, [ speaker side] and 1" for the sides and 3/4" for top, bottom and back, then brace the box, [1"x1"x1" blocks every 3 to 5 inchs on every seam inside the box, [12 of them] then as hks85 and unrefined7 said seal the MDF from the inside, fiberglass resin works very well, or better yet get one of the spray dampening materials, [Dynamat, Accumat, or the like] also some hints on box building, predrill and use wood or drywall screws, screw at an angle, [screwing straight into the edge of MDF will split it, that is why I use 1" MDF for the sides, the top, bottom, back and evan front, [face] all screw into the sides, that way you can start about 7/8" in from the edge and angle the screw towards the outside, use 1.5" screws for the 3/4" MDF and 1.75" screws for the 1" face, glue all the pc. together, you only need glue, no screws, for the "braces" and just to be sure box is sealed, run a bead of silicon along every seam. Also don't forget to predrill the speaker mounting holes all the way through the 1" MDF, [or you will "flake" out pcs, of MDF at every screw hole] a little silicon on the screw before you put it in will make it airtight 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by unrefined7 &raquo;</TD></TR><TR><TD CLASS="quote">i was told by the local shop that if i plan to make a sealed enclosure for a 12" jL w7... i must get [3/4 x 2] which is 1.5inch thick MDF wood to build my enclosure?</TD></TR></TABLE>


see what you really want is to make a box that's 2 1' MDF with about 1/2 of space between them before you put on the face, pour in some cement... lol

 

youd think they would recomend baltic birtch over 2 layers of mdf.............

 

you dont have the double 3/4 mdf the box, im an installer and build a lot of boxes for 12 & 13w7's, and what i do is build the box out of normal 3/4" MDF and double up on the face of the box (the board that the sub mounts to) if you make precise cuts, and liquid nails or caulk up the box really good, you will not have any trouble running 3/4" MDF...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AmbidextrousHatch &raquo;</TD></TR><TR><TD CLASS="quote">youd think they would recomend baltic birtch over 2 layers of mdf.............</TD></TR></TABLE>The denser the wood the better, but the cost of hardwood over MDF makes MDF a very good alternative 94