#2
Nope, that's weird. Hiss and hum happen with tube amps but that sounds strange. What's it plugged into? Try plugging it into a surge protector before doing anything drastic. The tubes could be old too, especially if it was a floor model or something. Try tapping some of your preamp tubes with a pencil eraser. If they make a thump they've gone bad.
Winner of the 2011 Virginia Guitar Festival

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#3
Not to worry. Spoke to the shop and they agreed to just swap it for another. Problem sorted Thanks guys.