It lacks low bass compared for the larger EPICBOOM, way too. You can check out the Anker Soundcore Movement Boom Plus If you need a similarly priced waterproof speaker with a little bit additional low bass. Having said that, the Anker is not quite as small because the Ultimate https://www.bluetoothspeaker.top/hot-selling-inalambrico-speaker-bt-built-in-battery-waterproof-speakers/