I've had this amp for almost 2 weeks. It's about a year old and I got it off of somebody from ebay. Luckily it has a warranty so I know if I have any problems it can be fixed. My question is this: I do realize that tube amps generally are noisy by nature but everytime I play my lead channel I get the worst squealing and low end noise (a hum). I have my master level at 4 and my output level is at 1 to 1.5. I'm playing a les paul through it. Is there anything I can do to stop these horrible sounds? I dont know what to do for live situations let alone recording.