Question about two types of MDF

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Klondike

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Joined: December 06, 2004

Location: United States

Posted: January 02, 2005 at 10:41 PM / IP Logged

I recently learned that there are two majorly different types of MDF. The first I found is common in most hardware stores like Home Depot and Lowes and is the usual pretty heafty weight. I found a second kind that is MUCH lighter I would say at least 50% lighter. My question is can I use this 3/4 or 1 inch light weight MDF to make a box or will the sub just blow the box apart. I am thinking of using a Brahma 12 in a sealed enclosure with only 500 watts.

Any input on this topic would be greatly appreciated.

Thanks.

geepherder

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Joined: October 27, 2003

Posted: January 02, 2005 at 11:18 PM / IP Logged

Yes, you can use it as you would regular MDF. It's just as strong, but the light weight makes for the hefty price tag.

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Klondike

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Joined: December 06, 2004

Location: United States

Posted: January 02, 2005 at 11:53 PM / IP Logged

Does anyone know what makes it lighter yet still just as strong?

This is surprising to me since I would guess that the lighter MDF is not as strong. If is just as strong this will be a great thing for me. Since I can save a TON of weight and reduce the negative effects of the added weight on my high performance vehicle.

thanks.

stevdart

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Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: January 03, 2005 at 12:00 AM / IP Logged

Wood fiber is inherently strong. Glue is not as strong. But there has to be a good combination for overall stability. The lighter weight board has larger fibers and less glue, so the weight is less. The other exteme is plain particle board, which is very large fibers and much less glue...which is not strong enough. As long as you're not talking about particle board, you should be able to make a fine box with it...but if the area around the face of the sub is minimal you may want to double that wall. And doesn't a Brahma want at least 750 or so watts, or is my memory off on that? The volume you are giving it will make a difference in how much power it wants to perform, too.

audiocableguy

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Joined: January 27, 2003

Location: Idaho, United States

Posted: January 03, 2005 at 11:43 AM / IP Logged

I have a block of each in front of me. The weight difference is 50%. There is a difference in density. The lightweight doesn't have the rigidity of the standard MDF. If you are running large subs and plenty of power I would stick with the standard MDF. A quality box makes all the difference. If you are worried about weight, try fiberglass.

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Question about two types of MDF

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