Read a few posts here about installing the tang band speaker into the factory sub box which required removing the original mounting hardware and making a insert out of mdf to mount the speaker to. I figured that since the grill wouldn't be reused with the install of the tang band speaker that I would try and see if I could cut the grill out and expand the opening to fit the speaker. I used my dremel tool took about a half hour but it worked. I then drilleed some pilot holes for the 4 screw holes on the speaker. I mounted the cover first then inserted the speaker and secured it with 4 self taping screws. The speaker comes with some foam on the backside to make a table get seal so I didn't have to use anything else. It worked perfectly !!20 times better sound very nice deep bass for such a small speaker !! Much faster install then cutting mdf!!

Here is a pic of the finished product. Don't mind the brown screws I used them as they were the perfect length and had a larger head on them and were self tapping aluminum siding screws. Worked perfect

Looks good!

I ended up making a sheet metal end cap for mine... a lot more work.

Wow that is a lot of work!!

Nice!!

Tempted to pull my TB sub out and rework it now.

I did the same many years ago.