I'm installing 2 10" Focal subs in an inverted position...what screws should I use? The box is 3/4" MDF. I was wondering where I could get wood screws with allen bolt heads.

And is the screw suppose to be long enough to go through to the inside of the box?

[ July 08, 2004, 04:56 PM: Message edited by: Grey Z34 ]

 

A lot of people use these T-nuts and bolts to fasten their subs. If you have enough lip overlap I think they would work very well.

I usually have two layers of 3/4" around the mounting area and then use 1 1/4" - 1 1/2" #10 wood screws.

Gene

 

1" screws, #10 is a good size.

 

So with these T-nuts are you basically drilling a hole all the way through the baffle and then using a regular allen-head machine screw (with no point...just a flat tip)?

 

That's exactly it. In my mind they are the best way to secure drivers to cabinets. I won't ever use a wood screw to hold a heavy woofer into a cabinet [img]smile.gif[/img]

 

Yup, machine screws for the t-nuts.

Gene

 

T nuts are exactly what I used, way better than dry wall screws, better seal achieved with them as well

 

Can I get these at Home Depot or Can Tire?

 

Yep, most any hardware store will sell them in bulk for a few cents each.

 

I would personally avoid using T-nuts

I found that if you're using them in an MDF box that the nuts tend to just rip the box appart.

Once that happens it's a real PITA to get the subs out because the nuts/bolts just spin.

I just use wood screws [img]graemlins/thumb.gif[/img]