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Message Forums Car Stereo Message Forums > > MDF and screws don't mix
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F1reFly
New Member

 MDF and screws don't mix

Brand new box, i started in with some screws and 3 of the 8 were instantly ruined and can't tighten down and its causing a very slight air leak still. I need like a syringe and some type of filler that would allow screws to tighten....any such? All i can think of to do is to bust out the silicon adhesive but hate to. What do you guys that have mdf baffle do to get a good tight seal around your sub? I know a plywood baffle would be ideal but this is an Atrend premade box.

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New Post 08-20-2010 09:30 PM
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mc
Senior Member

 

T-nuts

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New Post 08-21-2010 08:59 AM
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F1reFly
New Member

 RE: RE: MDF and screws don't mix

quote:
Originally posted on 08-21-2010 by MaximusCarAudio

first off you stripped the box or picked up to think of a box if you sub needs to be bolted down that tight. 2nd you need a gasket for the sub most 1/2 way good subs come with it or have it built on its a thin foam that sticks to the bottom of basket lip to take up any little gaps the wood has.



i know i stripped the box. ? my subs already have gaskets, but typically if all the screws are not pressing firmly enough on all areas of the gasket, there will be a slight leak which can be seen/heard by pressing on the sub cone. The box carpeting does not help that seal either without firm pressure. All the more reason i need all 8 screws tight, which actually, the 3 screws that failed, i did not over tighten or get tight to begin with, it just happened before the screw got firm. why i dunno but i was careful. i like to make sure my enclosures are 100% air tight. i'll try the T nut as MC suggested but aren't those for bolts and not screws?

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New Post 08-21-2010 03:35 PM
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mc
Senior Member

 

yes they are for bolts

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New Post 08-21-2010 03:41 PM
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Ianarian
Member

 

This reason is why I double baffle, well and its more solid. Then I use a 2.0" SS Grabbers. Thank god you are doin something about the leak. Good time to bring up that a routine check for leaks is never a bad idea. The other day I thought I had been losing a little sound.... I was able to turn each screw maybe a 1/4 turn tighter. Man, was I missing something... Sooo much better now.

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New Post 09-01-2010 02:11 AM
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ericeric124
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sicaudio
Senior Member

 RE: screws are not for retards!

quote:
Originally posted on 02-22-2011 by ericeric124

pre-drill your holes buddy or use a nail gun. dont try to sound like such a noob. take a woodshop class at your local community college . And yes mdf, like any wood will crack if not pre-drilled. screws well help ensure your box is more rigid and dense and can help keep sound pressure in better for a more linear sound wave. use screws and wood glue



this is sound advice guys... I make most of my living and raise my kids on money I make from good solid enclosures...I always tell everyone it is all in the box...and the install...

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New Post 02-23-2011 11:40 AM
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newfosgatesucks
Senior Member

 

pre-drill with 1/8 inch bit and use coarse thread sheetrock screws. Use a countersink and 2" screws on the box, 1-1/4 on the subs. Using a bottle of wood glue put a drop on each screw hole in the box as it will go down in the threads and strengthen as it hardens, so the box won't vibrate apart.

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New Post 03-01-2011 02:34 PM
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sicaudio
Senior Member

 

i use a 3/32" bit with built in CS and 1-5/8" screws..but i also use TB2 ;) and resin the interior for a fee..and route the edges...and apply spray on line-x bed liner... lolz I do it all ;)

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New Post 03-01-2011 10:37 PM
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newfosgatesucks
Senior Member

 RE:

quote:
Originally posted on 03-01-2011 by sicaudio
i use a 3/32" bit with built in CS and 1-5/8" screws..but i also use TB2 ;) and resin the interior for a fee..and route the edges...and apply spray on line-x bed liner... lolz I do it all ;)

What is your opinion of carpeted enclosures, I dislike the air leak problem, although I am aware of the several fixes... And the resin is always a +! I didn't do mine, as I was already .02 cubic feet low of my target Q...but I am braced to hell with 1 inch baffle. Still thinking about fab-glassing a box, I'm at 7.5 cubic feet with 3/4 cabinet grade and I think I can get to 9 feet with glass... ....there's at least 14 pieces to my box, in an acura trunk, to get space..I could always kill the back seat and do dual 6ft ported, but it's just tacky for daily... I gotta go sand a guitar down.

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New Post 03-02-2011 11:09 AM
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sicaudio
Senior Member

 

anytime I carpet an enclosure i sink the sub into the face with a routed channel so there is no airleak :)...personally I think carpet is gay....I prefer paint and Line-X :)

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New Post 03-02-2011 10:42 PM
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billhofe128
Member

 RE:

quote:
Originally posted on 03-01-2011 by sicaudio
i use a 3/32" bit with built in CS and 1-5/8" screws..but i also use TB2 ;) and resin the interior for a fee..and route the edges...and apply spray on line-x bed liner... lolz I do it all ;)

sounds like exactly what i do

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newfosgatesucks
Senior Member

 RE:

quote:
Originally posted on 03-02-2011 by sicaudio
anytime I carpet an enclosure i sink the sub into the face with a routed channel so there is no airleak :)...personally I think carpet is gay....I prefer paint and Line-X :)

That's actually a cool idea. I seldom carpet one. Never have on my ride. I always make the box a little on the small side if it's carpeted.

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New Post 03-03-2011 07:52 PM
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F1reFly
Member

 RE: screws are not for retards!

quote:
Originally posted on 02-22-2011 by ericeric124

pre-drill your holes buddy or use a nail gun. dont try to sound like such a noob. take a woodshop class at your local community college . And yes mdf, like any wood will crack if not pre-drilled. screws well help ensure your box is more rigid and dense and can help keep sound pressure in better for a more linear sound wave. use screws and wood glue



whoa, easy there hardass. if i sounded like a noob who didn't pay for woodshop just to drill some woofer holes then guess what, i probably am one. lol hardass's are funny

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New Post 03-08-2011 08:05 PM
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sicaudio
Senior Member

 

no doubt Firefly lol especially since he is wrong... MDF has 0 wood in it....it is paper and glue lolz hence the name medium density fiberboard...

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New Post 03-08-2011 10:03 PM
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