I think I found your problem. But seriously, it shouldn't that much matter. For convenience sake, use the iFi volume control to match levels with the second input on your Schiit and use the Schiit's volume control to match levels with the other sources to your Yamaha. Use the Yamaha volume to control final playback level.

 

If you're using the Schiit volume because it's closest to you, then turn the Yamaha down and set the Schiit to maximum. Turn the Yamaha up to the loudest you'd ever listen, then use the Schiit volume control going forward. The last thing I'd recommend is leaving the Yamaha ragin', full on.

 

Thanks, I am now getting more range of volume control with the Schiit SYS. I knew there was good answer out there. With my Schiit Modi2 it was not a problem. The nano has a built-in headphone amplifier and I just had the Yamaha repaired, so I was perplexed on which combo of settings would sound best. The volume control on the nano is great when used as a headphone amp, and my thinking was that Yamaha needed to be running 100%, but everything sounds better with the receiver at 50% output, the nano at 100% and the Schiit has full range of volume control...