JBL Xtreme review: Enough boom to fill a very big room

If I didn’t know better, I’d say JBL took the winning design of its Charge 2+ portable Bluetooth speaker and handed it off to Hanz and Franz for a month-long pump-you-up camp. The Xtreme is a super-sized, barrel-bomb of a speaker that delivers ludicrous amounts of bass from not one but two 2.5-inch transducers, aided