JBL's huge and waterproof Bluetooth speaker, the Boombox, is currently on sale over on Amazon for $342.58. This beast is meant for those who want a powerful, portable way to listen to music, something that can withstand a lot of punishment. Even from just looking at it, the Boombox looks like it fits that bill.
Sporting a massive 20,000mAh battery, JBL claims that the Boombox can go for 24 hours "without missing a beat." Being IPX7 rated, it can handle even the craziest parties, regardless of weather, and still push out hefty bass to keep things going.