Hello! So up to this point I have only owned what I considered to be "good for the price" amps (e.g. Peavey 6505+, Mesa Boogie Stiletto Deuce II, Jet City JCA50). I saved up and bought something called the Unholy Trinity a Metro/Merren/Friedman modified JTM 45/100. I've always loved music from the 70s and 80s so really a Marshall of some sort really seems like a good fit for me. Now the amp sounds great (there are 3 videos that someone has uploaded on youtube if you are curious). But at first I didn't notice it that much but it's like when you notice a scratch in a new car. The amp seems to emit a constant hum/buzz through the speakers. I was using a LP copy guitar, I swapped cables, unplugged all pedals, plugged directly to the wall, checked for loose tubes. But the noise persists. So my question is this from my understanding amps with a master volume mod, plus extra gain tend to create more noise. Is what I am hearing just par for the course?