AC Power Cord and Krell Pre

Thanks for your comments. The Krell Evo 202, according to the Krell manual, has its own power conditioning system, and Krell says that it should be plugged directly into the wall, not into a power conditioner. Also, one should use the cable that is supplied with the unit. But I can't help wondering if an aftermarket cable would improve the sound. If Transparent and MIT cords have their own filter boxes, wouldn't they duplicate or perhaps negatively impact the filtration provided by the Krell itself? Has anyone actually experimented with aftermarket cords on the EVO 202? There are so many brands of power cords that I hardly know where to start. I think, though, that I would prefer cords that don't actually filter the signal.

Thanks to John and Dave. I will do as they suggest -- that is, experiment. I'll start with a Nordost Brahma PC now connected to an FM tuner, then go to an Electroglide Epiphany XG (G is for grounded) now reposing in a box, and then try others, probably through the Cable Company.