Danaroo,
That is rather personna question but I will share with you some solutions
just the same.
Step A:
Start by prying off the ring around the driver.
Any old oversized screwdriver will do.
If a large prying tool is not available, Vice Grips will do.
If you find the speakers tighten from the inside ignore step A and try step B
Step B:
Pry the back cover off.
If it gives you any trouble use WD 40 liberally.
Sometimes, like a pickle jar, it will require repeated
firm rappings with a ball peen hammer around the perimeters.
If Step B fails to bring joy, go to C
Step C:
Forget retightening screws all the darn time. Mix up some
marine grade, two part epoxy glue. Let it set until it is like honey.
Get a plastic straw and partially fill it with the mix.
Very Carefully wedge one end of the straw into the space around the driver.
Slowly exhale into the straw as you slide the straw slowly around the exterior.
Don’t be concerned if you drip some on the cone face. It wipes right
off with acetone.
Hope that addresses all your needs!