I have an Aguilar GS-112 that I love, but recently the tweeter rings out like there is a loose spring inside or something like that. It happens a louder volumes and will ring as long as the note is being played. Right now, I turn the tweeter off, but I do not want to do this. Any suggestions as to what might be happening here? Here are the heads I play through. I do not turn these heads up past a certain level, because the cabinet only handles 300 watts @ 8 Ohms. Mesa Boogie D-180 Ampeg B4R Sunn 1200s Thanks for your help.