Hey everyone, I am turning to the faithful TB community for some help. Last night at band practice before the guitarists came down (were smoking outside) I turned on my rig and had a little warm up jam session with the drummer. It was going good and then I started to notice and hear a small static type sound. Thinking it was perhaps the extra drum kit's cymbals or snare that was sitting on next to my cab or something else rattling it. Well long story and search short I found the sound seems to be coming from the horn on my Mesa Powerhouse 6x10 cab (or whatever that small little speaker type thing is between the top two speakers). It is not too terribly loud and when I am playing with the rest of the band it is not noticeable at all really. I do not play at massively high volumes, just barely over a quarter turned up on my Peavey Tour 450 head. My question is does anyone know why it may be doing this? Is the horn going bad or is it suppose to make that noise? Also do I really need it? What are the benefits of having a horn anyways? Is there any way to shut the horn off or disable it? Seems like a lot of questions, but I am only cautious because we have a pretty decent sized gig this Wednesday night and do not want to blow it out or have any other things go major wrong. Plus I do not have the money to really fix anything major right now either. Any ideas or comments would be greatly appreciated. Thanks as always!