The Wonderboom four delivers a pure balance of bass to midrange to treble, which usually means no devices or voices are unnaturally boosted. For all twenty five speakers we tested, the average battery life was a bit under 17 hrs. The Sony Ult Area seven wins the title for https://www.bluetoothspeaker.top/subwoofer-dj-loudspeaker-outdoor-bass-high-quality-loud-speaker/