Thanks for the comments so far.
@noromance Your proposal is sound, as long as there is a reason to try a cord without a conditioner. Right now, the Audience unit is also protecting the gear, and given that our power went on and off 5x the other night (weird storm), I'm loathe to plug anything into the wall that's not protected. That said, I will be moving into another room next year which has a whole house surge protector installed, on a dedicate line.
You all see the trouble, I assume -- if there is enough between the wall and the audio gear (conditioner, power strip, etc.) there may be no way for the subtleties of a powercord change to be heard. It would be like changing a subtle flavor in an already powerful stew.
This is why the "daisy chain" experiment mentioned above is not clearly worth the time for me.