Sound quality: JBL's Charge 4 had Good overall sound quality. Bass has good impact, but is a bit boomy, and deep bass is lacking. Midrange is somewhat hazy and grainy. Treble is smeared and somewhat subdued, upper treble is muted. Does a so-so job of recovering 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 small to medium sized room. When two units are used as a stereo pair sound remains somewhat hazy and congested, it can get louder, bass is pronounced but 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.