Couple of questions to this new m9 owner, I understand the relay based volume but is it normal for my speakers and/or headphones to pop while changing volume regardless of how much volume is being changed?
My sa31se never did this, although that was an up down button vs knob.
I'm sure I have more questions here.
With the unit powered on and no music playing, turn the volume all the way up and down, or even just through your regular listening level a couple of dozen times and it should go away.