Here is one of the loudest wireless Bluetooth speakers money can buy. The SOUNDBOKS Gen 2 has 122dB of volume and great bass. It comes with a swappable battery pack that lasts up to 40 hours. This speaker weighs 33lbs, so you can take it anywhere. It is splash proof and water resistant.
The SOUNDBOKS 2 Speaker comes with two 10-inch woofers. It has a light aluminum frame and birch cabinet. You can find out more about it here.