I wanted to find the best solution for waterproofing the speakers that I had selected, or at least make them water resistant. But, i also wanted to maintain sound quality. The solution that I devised was to glue gun the speaker into the grill with a thin layer of plastic between the paper cone and the grill. I used thin, yet strong plastic from a clear trash bag (black would work just fine). The important part is to stretch the plastic taunt as the glue is cooling, so that it will still transmit sound clearly - much like a tympanic membrane. After the glue cooled, I trimmed away any excess plastic to prevent any buzzing or rattling. It is also important to thread the speakers through holes from inside before sealing it, as the hole is too small for the whole grill assembly to fit through. With this particular speaker grill design, I also decided to use some of the surplus plastic (trimmed from the container) to seal the two sound ports on each grill.