Ultimate Ears BOOM 4 vs Anker Soundcore Boom 3i

The Ultimate Ears BOOM 4 and the Anker Soundcore Boom 3i are both good picks if you're looking for Bluetooth speakers that work as well outdoors as in. The Ultimate Ears' 360-degree design keeps audio sounding the same regardless of your listening angle, which makes it great for sticking in the middle of a park hang. On the other hand, the Anker's protection against saltwater and rotating drivers that always face up when the speaker is floating make it the obvious choice if you like to get wet with your speaker. By default, the Anker has a more balanced sound, but you can customize each speaker's sound via their respective companion apps. The Ultimate Ears' main downside is its lack of support for multi-device Bluetooth pairing, but it can sync up with a bunch of other Ultimate Ears speakers in Party mode. The Anker doesn't have a party mode, but it does offer stereo playback via another paired unit.