It lacks low bass compared to the larger EPICBOOM, too. You are able to check out the Anker Soundcore Movement Boom Plus if you want a similarly priced waterproof speaker with a tiny bit extra low bass. However, the Anker isn't quite as small given that the Ultimate Ears, https://www.bluetoothspeaker.top/wireless-microphone-speaker-outdoor-karaoke-audio-music-party-speaker-box-home-gift-speaker/