riven1950 wrote:
Just thinking, if you never plan to use the speakers, remove them and waterproof them from the inside. You may be able to seal the grill with something that will make the grill waterproof and not noticible from the outside. ( some thing on the order of flex seal or a good caulk, would not have to be pretty ) Then caulk around the edges and you don't need to fill the hole or buy a cover. If you change your mind later just buy new speakers.
Great idea did not think of going that route. Wonder if I sprayed expansion foam on the back of the speaker cone and trim it to fit back into the hole if that would hold up?