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Hela-Coils or T-Nuts for Subwoofer Mounting

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Old 08-18-2011, 03:08 PM
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cpo
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Default Hela-Coils or T-Nuts for Subwoofer Mounting

Which do you prefer? What specific sizes do you use? Also, do you use adhesive back weather stripping foam or the soft gray putty to help seal the sub in the enclosure?





or




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or



Great link for basic info:
http://caraudiomag.com/articles/subw...roper-mounting
Old 08-18-2011, 09:08 PM
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I use foam/rubber gaskets.

T-nut or hurricane nut, doesn't really matter which. Just use plywood for at least the baffle, not MDF. They all work crappily in MDF. In fact, MDF sucks with screws completely.
Old 08-18-2011, 09:10 PM
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i used to use the putty, but 99% of the time i dont need anything to get a good seal
Old 08-18-2011, 11:08 PM
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Originally Posted by dragonrage
Just use plywood for at least the baffle, not MDF. They all work crappily in MDF. In fact, MDF sucks with screws completely.
Yep, I've learned that the hard way once or twice.

I'm going to be using a pre-made box for the time being, I guess I could sandwich a piece of 1/2" hardwood (birch I think) with a thin layer of Liquid Nails clamped down with deck screws. Is this an acceptable thing to do?
Old 08-18-2011, 11:40 PM
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What if the box is plastic? Can't really use hela-coils or t-nuts.
Old 08-19-2011, 07:00 AM
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Use regular screws with plastic, I think.

I don't recommend Liquid Nails - the best two glues for box building by FAR are good old Elmer's Wood Glue and Titebond II (not III). Liquid Nails will probably work, though it's not as good. Another one to avoid (some people recommend it when they shouldn't): Gorilla Glue. It is acceptable to glue some hardwood or plywood behind the MDF to use . You just need to glue the board and clamp it until the glue dries. No need for a single screw when you build a box (though you can use them if you want).




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