The Wonderboom 4 provides a normal equilibrium of bass to midrange to treble, which usually means no devices or voices are unnaturally boosted. For all 25 speakers we tested, the average battery life was just a little under 17 hours. The Sony Ult Subject 7 wins the title for https://www.bluetoothspeaker.top/manufacture-led-rgb-light-wireless-bluetooth-speaker-for-party-travel-outdoor-home/