Any of you guys that own vtf3 mk5’s experience any port noise? Only ask because I just had my test tone on for sub yesterday turning the volume down a hair and I heard a little out of 4in port, 3in is plugged. It was not loud what so ever, had to get my ear right near the port. But it was weird, it sounded more like a rattle and I stuck my hand in there just touching around and it would go away. I just got both of them last October and lately I haven’t been down there, haven’t heard it until yesterday. Any thoughts?