Hi!
I’m reading the manual of the UR44 where it says: “HINT! Proper use of HI-Z and Line Inputs”…
But I get confused here… It says to use an electrical guitar or/and an electrical bass guitar that has a passive pickup system into the HI-Z input. That’s okay with me, I understand that… But the confusion comes around when in brackets it says “battery-powered”…? To me passive pickups doesn’t have batteries in them, only active pickups does…
So now, what is the proper use of the HI-Z and Line Inputs for “normal” guitars/basses? With normal I mean those that doesn’t have batteries in them… 
Many Regards, Robin Gardner