76-KT (audio hiss)

I purchased the 76-kt a few months ago. It's completely unusable due to the loud audio hiss. I was going to literally throw it away but then I thought of contacting you guys for help. I did create a ticket for technical support about a week ago but have yet to receive any reply whatsoever. The unit I have is completely useless. I mean just turning it on creates the most awful audio hiss. The higher the output, the worse the noise gets. I've tried everything from feeding it a hot input to avoid turning up the output level, to going through a gate to supress the noise but nothing seems to help at all because the hiss is very loud and can be heard behind the vocals or whatever I'm trying to compress. Any help?


Thanks in advance.