So I was working on my new PA this week getting ready for our second show with it, hooked up my RH450 using the line out only and almost no signal. I've had this head for over 3 years and haven't had one issue so I was thinking something was wrong on the PA. Finally I grabbed my Genz Benz 3.0, that I bought recently as a backup and there was my signal. So has anyone else had this issue and is it repairable? We had a show last Friday and it worked fine. I just spent a good bit of money on the new PA and I really wasn't looking to buy a new amp. But then again it is a good excuse to try something new. 