Hello Washburn,
Just another 0.02-the source knob is NOT an issue for me. As others have posted, selecting the source w/ remote makes it a non issue. If you use the knob, just turn it SLOWLY. As for the volume via remote, it is a bit touchy, but I've learned to use very quick taps (holding the remote w/ one hand, and tapping with the other). It never crossed my mind to return it because of either of these two "issues". I do believe that you will be impressed w/ the SQ of the Retro. Good Luck!

Porta