I have the level knob all the way up on my hx stomp and the input signal I receive in my DAW is very low, which requires me to increase it by 15 db to reach a decent waveform. I think it's really a lot to increase a recordings by more than 3-4 db's.
I just found out that the power adaptor of the HX stomp is not grounded. Could be that the reason of my annoying ground noise? If so, (apart from wondering why Line 6 engineers did not thought of a grounded power adapter) which power adapter I could buy to solve the issue? Furthermore, could I solve the problem by buying a filtered power strip?