Hey, I need your help. I recently purchased a JBL PartyBox Club 120 speaker, and when it's turned on and in idle mode without playing any music, I noticed a constant noise coming from the tweeter. This noise is only audible when I place my ear close to the metal grill where the tweeter is located. Can you check if the same thing happens with your model or any JBL PartyBox speaker you currently own? Please let me know.