I plan to build a 1x12 cab to use with my open back combo amp. What is the best way to fasten the speaker to the baffle? I was thinking of using T-Nuts. Is there a better option? Thanks.
If it's a cab that you will not be swapping speakers in much, and it's made of quality birch ply - then just press the "easy" button and go with big pan-head wood screws. Other options: the threaded insert (my fav), or studs mounted through the baffle (ala vintage Fenders). Oh, and if your REALLY a glutton for punishment, check out the Burriss DC cab and try to roll one of those mounting systems yourself (good luck...).
Oh, but seriously, good luck!
If you use T-nuts, put a drop of blue Loctite (242) on the screws. You'll thank me later!