So I have been using my Goliath III for about 8 years now and it has always done well for me. Recently I have noticed an undesirable hiss from the horn when I turn on my amp. It sounds like it may be a blown driver when I play through it unless I turn down the l pad, then I just get a bit of light buzzing. I have heard that the horn itself may only need to be reseated or reseated at the cabinet, but I think my actual driver may be shot. I have also heard about the fuse in the x over that could be bad, but I would think that would give me no sound from the horn at all. Where should I start?