Sound quality: JBL's Xtreme 3 had Good overall sound quality - this model reproduces music and dialog reasonably well despite the obvious shortcomings in its sound. Bass has good impact, and goes fairly deep, but is slightly prominent and somewhat boomy. Midrange is fairly even, but is somewhat grainy, a bit hazy and etched. Treble is fairly extended, but slightly smeared. Does a so-so job of recovering room ambience and sounds a bit congested. When two units are used as a stereo pair the sound stage can be made wider depending on placement. Provides a decent volume level in medium sized room. No significant difference between Bluetooth and Aux input sound quality.