I'm playing a Carvin R600 with a 410 Carvin cab. I usually have the horn set at around 8. At practice a few days ago the cab starts creating fuzz and a very annoying distortion when my attack gets stronger. I fiddled with it awhile to see what the problem could be and even inspected the speakers and found nothing that would lead me to believe they are the problem. I turned the horn off and the sound is pretty much gone. I don't have the same tone without the horn, which is somewhat disappointing, but I can gig with it as is at least. What I want to know, is if anyone has had a similar experience and if they found out what the problem was and what can be done. If I simply buy a new horn and install it, could that fix the problem, or could it be wiring? Any help would be appreciated. Thanks.