I had some hum once. I tracked it down to a pesky pre-amp. When I replaced the pre-amp the hum went away. You can imagine how ticked I was after adding three dedicated circuits with dedicated neutrals and an isolated ground.
Being an electrician by trade the circuits only ran me about $100.00 in material and half a day in labor.
My point being the cleanest power in the world won't always help your hum problem.
Being an electrician by trade the circuits only ran me about $100.00 in material and half a day in labor.
My point being the cleanest power in the world won't always help your hum problem.