Harley Benton Spaceship PowerBar 60XL-B

Everything is great about this source but i have two inconveniences:
1. when connected to powersource the transformer makes a 10khz noise which is picked up by guitar pick-ups and it’s annoying
2. You need to pay attention that you are connected to a good socket. I was actually doing half of concert on battery than my battery died mid concert - it was my mistake cause i didn’t make sure that electric connection worked.


In studio I track guitar only on battery - the noise is incredibly low.