scew up on speaker hole

is the box MDF or fiberglass?

And how big too big is the hole? i cant imagine the sub falls through the hole..but if that is the case..then oh my..LOL..didnt you test fit the sub first before assembling the box?

if the hole is just a couple millimeters too big then it wont matter..as long as the screws will bite in without breaking loose...

i would assume it fiberglass since it is in this section...but you never know sometimes...LOL..

anyway...how is the sub mounted? intended to be mounted? were you going for a flush mount? if so it is an easy fix...if you were already going with a surface mount then i suppose the method above would work...

if you went with a flush mount design then just simply cut a ring that will fit in the hole and support the sub..you will then have a surface mount setup but it beats cutting the front of your enclosure out..

if your box is all MDF just recut the panel properly. and reassemble.

I have another idea.  As mentioned above, if its just MDF, which you seemed concerned otherwise....it must be an MDF ring in a FG enclosure.  I had to build up an inner rim of a ring once.  I used polyester resin with talc and MDF sawdust, mixed it all up about 33% each, when it thickened as it was fully mixed, I added the hardener.  I timed it just right, right before it started to gel and give heat, I layered it on quickly on the inner rim of the ring to build it up...or actually build it in.  I acquired help between the quickly added layers, someone using a heat gun which aids in quick-cure (not really cured, but it hardens very quick) so that you can add another layer...uh, how many times have I said quickly.  Build it up as much as you need.  then all nice and carefully drill your holes in the build-up area and use a bolt/t-nut combo to secure the speaker in, instead of screws that will bite and possibly weaken the area.  If permissable, wet up(saturate) the whole ring, cover the rear of the speaker with foil, and press the speaker into it, that way it will cure to the shape of the speaker as well...then remove the speaker when cured, remove the foil, re-install the speaker....blah, blah, blah.  As for me, I bet this is the last time you make this mistake..LOL  It was my first and last mistake, test fitting should always be part of your build/fabrication regiment.  Either process you follow, I hope you the best.  Good luck, and lets us know whats up.

......there you have it.  Should be simple in that case.  Now, get to work and take pics so we can see that youve overcome the obstacle and gloat of your masterpiece!