Soundstage

Wife swopping or wives who swop the floor?
Sailors who swab or slobs who grob? 
How about swovid tests with swobs?
And to the swOP, glad your speakers are gtg.
Bad connections are always swoblematic.

I'm with lowrider57, nonsense 

I think that it's a groe area

Have had the same issue with Arcam receiver (or believe it is the receiver).
After it warms up, the soundstage drifts to one side due the loss of volume in one of the speakets. Sometimes even accompanied by a subtle crackling noise.
Once I turn the receiver off and then back on, everything goes back to normal for the rest of the listening session.
Could be static accumulating somewhere but not sure. Definitely not IC, as the problem persists when switching between coax and hdmi.

I would have a full electron microscopic spectral analysis completed on the crystals in the metal of each cable, but I would first want to know the square root of the exact temperature (celsius) at which cryo-freezing took place - that will then give you proper wire burn-in and saturation quotients. And the arrows - ALWAYS pay attention to the arrows - especially on the interconnects...