The Soundboks (Gen. 3) is the loudest Bluetooth speaker out there right now. Not only is it a large, weighty speaker, but it packs a serious punch in the volume department too, thanks to two newly upgraded 10-inch 96dB woofers and a 104dB compression driver tweeter. It dishes out 40 hours of playback per charge and features Bluetooth 5.0 for a smooth connection between your device and the speaker.
If the size (and price) of the Soundboks is too much, Amazon's Echo Studio is not only tuned to deliver rich, crystal audio at volumes of up to 90dB, but the stylish design means it would look at home in any room, while built-in Alexa voice control built-in is a welcome bonus.