Sound quality: JBL's Xtreme 2 had good overall sound quality. Bass has good impact and goes deep, but is a bit prominent and boomy. Midrange is fairly even but is somewhat hazy and grainy. Treble is fairly extended but is a bit smeared. So-so recovery of room ambience, sounds a somewhat congested, and lacks fine detail. No significant difference between Bluetooth and wired sound quality. Provides a decent volume level in a medium to large sized room. When two units are used as a stereo pair the sound remains somewhat hazy and congested, it can get louder, and since two separate speakers are used the sound stage can be made wider depending on placement and room ambience improves to decent, sound quality remains good.