u/Exotic_Writing9077

I bought 2 of these about a week apart the one on the right was my first party box, I had played them both on about 5-7 volume didn’t hear anything then when I turn them down, the tweeters made a static noise kinda hissing but I turned it back up and it disappeared is that normal? (I have warranty for both) should I get them looked at?, sell them and get a new brand?, or is this normal I am scared I may have accidentally damaged them.