said by joewho:Being particle board and considering the little room to work with, you'll probably have to rotate the speaker and make new holes. Trying to use inserts, washers, glue etc, probably won't leave you with anything you can tighten really well. Usually, once particle board is compromised, it's a waste of time to try and fix it. JMO.
If you're worried about the integrity of the area a wood hardener, Strong-tie, or even a coat of wood glue can be applied. There are tons of ways to restore particle board to like new condition if someone wants to do so.