securing sub in MDF?

[phatcat600 10+ year member]

MDF doesnt seem to hold screws well, Im kinda worried about my mag possibly shaking itself free. How do you guys secure your subs in?

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[Kenny Pollock 10+ year member]

I screw my subs in with coarse thread drywall screws right into MDF. My subs weight ~60lbs each and they're firing forward... no problems for me. Then again, I have four layers of MDF //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[pjvoc 10+ year member]

Doubt it, MDF is strong

Kenny, thats a lot of layers... lol

 

[SPL140.2 5,000+ posts]

predrill ftw //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif coarse drywall screws works for me, i never had a sub budge yet.

 

[Calikid 5,000+ posts]

predill plus drywall screws and youll be fine.

 

[phatcat600 10+ year member]

Yeah I was considering doubling up the MDF in front. Noones had a problem with one layer?

 

[tEh koRnDog 5,000+ posts]

i wish i had the money to buy a sub

 

[phatcat600 10+ year member]

yeah i make sure to predrill, the rest of the box is done

 

[Kenny Pollock 10+ year member]

Yeah I was considering doubling up the MDF in front. Noones had a problem with one layer?

No, just make sure you don't have the hole cut too big, you predrill and use coarse thread screws... you'll be fine //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[phatcat600 10+ year member]

My cutout is 14" diameter, my 15" mag doesnt seem snug at all. Will that cause peoblems? The hole is basically perfect.

 

[Kenny Pollock 10+ year member]

It doesn't need to be so tight that you can't fit it in //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif Just make sure there is adequate space for the screws to go in... if the cutout diameter is too big then the screws won't be very effective.

 

[Boulderguy 10+ year member]

I botched a few screw holes on the latest box & switched to T-nuts. Kinda a pain but much more secure.

 

[Kenny Pollock 10+ year member]

Yes, t-nuts are pretty secure //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Also phat: If it's 14" you'll be fine, I looked, that's the exact cutout diameter Stereo Integrity recommends for your 15" Mag.

 

[Blazin_Jason 10+ year member]

T-nuts (blind nuts) and machine screws for me.

 

[phatcat600 10+ year member]

Hmm what is a t nut...sounds nice.

Also, when I bolt it to my trunk floor I want a way to bolt it and unbolt it without taking the sub out. Are there any kinda nuts that auger themselves in somehow or effectively glue down so they dont need to be held?