sub box assembling with brad nails?
#12
Once in a while I will screw a box together depending on the need and if I have a history with the particular driver and power being used. I have had a couple of brad nailed boxes blow apart on me, more due to the idiot who was driving (and not wanting his box screwed down) rather than pressurization or resonation of the box. If I want a stronger bond I will use fibreglass on the inner seams, it is a much stronger bond than screws in general as it covers a much larger surface area. Dukk, I usually paint the inner surfaces of my boxes as it seals the pores in the mdf, mdf by itself is still very porous and bleeds air, paint or resin will help seal it, look at how easy it absorbs water to help prove the point. Yes it can be to do it, but if it makes a better box for a paying customer, a happy customer is a better customer.
#14
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Originally posted by MR2NR:
mdf by itself is still very porous and bleeds air, paint or resin will help seal it, look at how easy it absorbs water to help prove the point.
mdf by itself is still very porous and bleeds air, paint or resin will help seal it, look at how easy it absorbs water to help prove the point.
#16
Originally posted by DWVW:
</font><blockquote>quote:</font><hr />Originally posted by MR2NR:
mdf by itself is still very porous and bleeds air, paint or resin will help seal it, look at how easy it absorbs water to help prove the point.
</font><blockquote>quote:</font><hr />Originally posted by MR2NR:
mdf by itself is still very porous and bleeds air, paint or resin will help seal it, look at how easy it absorbs water to help prove the point.
#18
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Posts: n/a
blah blah - you can make two pieces of MDF stick together with a ShopVac too. oooh-aaahh. [img]graemlins/boring.gif[/img]
The point is your woofer is not a ShopVac. It pressurizes and rarefies the enclosure anywhere from 10 to 80 times per second. There is simply not enough time at either condition for there to be any net air flow through the walls of the enclosure. Attempting to 'seal' the wood is a 100% waste of time.
This is another excellent example of a demonstration that was conceived and passed around by people who have absolutely no business trying to teach anything to anyone else. [img]graemlins/freak.gif[/img]
The point is your woofer is not a ShopVac. It pressurizes and rarefies the enclosure anywhere from 10 to 80 times per second. There is simply not enough time at either condition for there to be any net air flow through the walls of the enclosure. Attempting to 'seal' the wood is a 100% waste of time.
This is another excellent example of a demonstration that was conceived and passed around by people who have absolutely no business trying to teach anything to anyone else. [img]graemlins/freak.gif[/img]
#20
Sorry guys i wasn't even trying to say mdf is too porus to use for an enclosure just stating that it is a porus material. The only use for fiberglass resin in an enclosure that i know of is strengthening the box.