Many tube line stages have "HT pass-through" where the volume control is out of the signal path via the source selector switch. The trick is to find one that can be used for such a purpose and NOT need to be powered on for such an application. I heard rumors the Modwright is such a unit but have not read anything definitive on this. Had my BAT 31SE had such capability, I would have kept it for my HT system as it was so superior to the B&K processor for music.
