Known Issue: One speaker with a dented grill has an unexplained low - end rattle. We thoroughly checked the drivers and searched for loose parts inside the speaker but found nothing.

To use these QSC WL2082 - i line array loudspeakers, first, place them in a stable position where you want to set up your sound system. Connect them to your audio source following the standard speaker connection procedures. When operating, avoid exposing them to extreme temperatures or high humidity. Regarding the speaker with the dented grill and low - end rattle, it still works but keep an ear on the sound quality. For maintenance, regularly clean the exterior of the speakers with a soft, dry cloth. Don't use harsh chemicals or abrasive materials as they can damage the speaker's surface. If the rattle problem gets worse, it's advisable to consult a professional audio technician.