One of the best mid-size portable speakers around. Those who already own an older Xtreme don’t need to upgrade to the JBL Xtreme 4 but there are some welcome upgrades in tow, including a long-lasting, removable battery. But the key draws are, as ever, strong sound quality and rugged portability. Removable, replaceable batteryGreat sound qualityHandy shoulder strap Default tuning is a touch bass-happyIt’s not cheap
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