We brought speakers and found out Pandora doesnt work in Mexico. We'll try again next year with a different site..
I bought one of the Bosch power boxes recently. It came with a subwoofer in the bottom. It's pretty loud. I was thinking about bringing it close to the Sexy Pool for the times when we don't have a DJ. iPad playlist or wifi will work good.
I don't think its waterproof. I would keep it away from the edge. For some reason I was thinking the music doesn't okay at different times. It seems like we had some days where the music wasn't nearly as pronounced so to speak.