background vocalist moves from left to right

I have the release on CD but would have to listen to refresh myself. Maybe a centered backing vocal and the room is boosting frequencies that draw it left.

I agree with Clbeanz. You are talking about 2 different systems in two different rooms, correct? The fact that switching speaker leads doesn't make a difference supports this theory, about the room that is. Try reversing speakers in the original room where the voice is on the right. It shouldn't shift sides there either, if this is a room dependent phenomenon.

thanks for the leads, i don't understand how the room would cause this.

Ryan Adams is smack dab in the center, and on stage right is the female vocalist/guitarist on my main system.

on my 2nd system in a separate room, Ryan remains in the middle, but the female vocalist is placed stage left.

I have noticed this was other discs as well, I recall Kate Bush Aeriel, one track has footsteps from the far edge of the speaker which progress across the entire stage to the other side. the steps begin from the left on one system and the rigth on the other.