Surprise for me anyway. I'm using Audioworks Revive power cords - not exactly cheap, but the new Pre has a 20 amp socket so used the cable out of the box and had the Audioworks reterminated with the Furutech 20 amp version. Now I'm very happy with the sound anyway so was really interested to plug in the new jobbie to see whats what. It killed the sound - smoothed it out of sight. Bye bye top end sparkle and dynamics. It just sounded flat in comparison to the stock moulded plugs cable.
So obviously bigger isn't always better. Not saying the cord is crap - it isn't. Just a lack of synergy I guess.