bipolarbear528Obviously it depends completely from situation to situation, but I used to get buzzing in mine which turned out to be wireless interference. Eventually I noticed that if I put a pop can between it and (I forget what device it was, maybe my CRT?) the background sound would improve a lot.
bipolarbear528I got it really bad in my room due to a terrible ground connection. First make sure everything is plugged into the same outlet/has the same ground. If that fails try buying a ground loop isolator. IF you are really desperate, use a ground lift adapter for your power plug, thats what solved it for me completely.
bipolarbear528I tried switching tubes and that wasnt the problem. But by that point I wasnt that desparate to get it to work so I ended up returning it.