Sounds silly, but what's the recommended screw for mounting woofers? I know majority used drywall screws. I remember hearing about some other screw that applies even pressure and goes flat. My screws usually are sideways or eat away at the mounting holes. And I imagine after subs get 50 lbs +, you need something solid

 

https://www.google.com/search?num=10...hp.HxxXFE8qk18



If you are really concerned, use T nuts and matching bolts.