I just got home with it about an hour ago - but already it might be going back. I had planned on using this to listen to music etc through my computer while cleaning etc.....but when I use the line out to AUX in from my PC, I have an annoying ground loop / background hum that won't go away. I remember now when I used to try using headphones with my PC, it did it too..... I also can't for the life of me understand how it works or how to edit effects and presets even after watching some youtube tutorials and reading the manual. I thought it was an AMP not a computer. I'm returning it on Friday.