I would have to agree with you...any hissing is usually caused from various components interacting with each other. I hope I dont have any hissing. I'll keep asking for a replacement till its gone.
Ive never had any hissing in my systems in the last 10 years, IM not about to start now. Im worried now about the possibility of hissing

I guess I'll have to wait and see.
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Play it LoUd!!