I just got a new 6505+ head and a rocktron hush pedal, it sounds really good but whenever I've got the gain past about 3 or 4 on the amp I get a loud hissing through my amp even with the gate put all the way up. Direct from the guitar I can put the gain up and I don't get hiss but I get feedback. Does it sound like there is possibly something wrong with the hush?
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