Quote Originally Posted by E-Stat
Actually, the nice thing about just comparing power cords is that you don't have to worry about matching gain.

rw
...but in practice perhaps not...after powering down to swap line cords how could you be certain that on re-application of power the amp has reached stasis and is now level matched? Particularly with tubes? Then you run into the problem of time...with any passage of time between samples, how could you be sure of an actual valid and discernable sonic difference?

jimHJJ(...that's why there are ABX tests...)