Power Cord/Tuner Combo

I just tried a Chris Venhaus Flavor 4 pc with my Linn Kudos tuner. The soundstage got huge - how about gigantic! It seemed like too much of a good thing. The tuner now had a much larger presentation than with my transport/dac combo. I switched back to a TG Audio HSR Gen A and the soundstage returned to an appropriate size. I'm wondering why the tuner reacted so. Might it be because the cable's ability to drive detail somehow over-emphasized the multiplex circuit? Any thoughts?