DemerBox Big Bang

The Big Bang is the toughest-looking Bluetooth speaker I've ever tested, and that's a good thing because it also happens to sound great, too. When the latches are sealed and the port plug is installed, the inside of the case acts as a bass reflex box...

Ultra-durable Pelican shell seals internal compartment from wind, dirty, and water, port hole on the front produces tons of bass, 40+ hour battery life with internal USB port for charging smartphones, reaches significantly louder volumes with better...

Expensive, there's no way to tell how much battery life remains in the speaker.

The DemerBox Big Bang Bluetooth boombox is at the top of its class in bass response, loudness, durability, and battery life. It's not the cheapest device on the shelf, but if you can afford it, the Big Bang is well worth the cost for a hand-built...