As a devout cable nut, I can say with absolute certainty (all laugh) that some cables need over 200 hours of settling time to reveal themselves. Cables that are dealer demos don't usually need a full weeks worth of current, but some new cables don't open up for a long time. The point is that anybody who swaps cables and listens for a day or two and then makes a value judgement hasn't given the cables a fair shake. I've had cables that started off sounding bad and actually got worse after about 75 hours of continuous current, only to open up with glorious splendor after 200 hours. There is a reason for this anomaly, but that's another thread all together.