Inside Boxes...

[Black_Jesus 10+ year member]

It isn't, then why does it **** up paint and anything else you put on it?It is porous.

And there really isn't a need to seal the inside of a box with polyurethane or paint or whatever else, but it can't hurt. Sealing it inside or out would help if you spill water on it or other liquids that would absorb into the mdf.

po·rous ( P ) Pronunciation Key (pôr

s, p

r

-)adj.

1. Full of or having pores.
   
2. Admitting the passage of gas or liquid through pores or interstices.
   
3. Easily crossed or penetrated.
   

it ***** up paint because it is pressed sawdust... not because it has holes.. which it shouldnt, if it does, its ghetto mdf... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif should be perfectly smooth all over:ladysman:

 

[gunny86 10+ year member]

Applying resin to the inside of any enclosure will help, it will make a better air tight seal (plus add strength and other factors, etc) which mdf can not make. Yes the difference between resin or not is small, but if you want to prove it to yourself take 2 pieces of 3/4 mdf put one on top of the other and then take your shop vac hose and put it on the top of the first piece of mdf, now lift up on the hose and both pieces will come off the ground and be stuck together.

Air can be pushed and pulled though mdf, this means sealing off the entire internal surface of your enclosure (coating with resin) will make a difference, ESPECIALLY in "sealed" enclosures, and enclosures with a powerful driver that can move alot of air.

So the more sealed your enclosure is the better your driver is going to work with it, ect. right? So that means that yes you could possibly get a higher TL score with a true air tight "SEALED" box.