I'll be damned, the 6ft 14 AWG power cord from Tripp-Lite actually sounds a bit better than the included 6ft 18 AWG power cord. Sharper transients, instruments are a bit more natural, bass is cleaner. How I tested it: two Jotunheims, connected to the iFi nano iDSD with PYST cables and Audioquest RCA splitters, volume matched by ear, one using the stock power cord, the other one the 14 AWG power cord. Let both warm up for an hour or so, then went back and forth, mostly with songs from David Chesky's headphone test album. Consistently liked the thicker cable better. Turned both amps off, swapped power cords, switched both back on, same thing. The one with the thicker power cord sounded better. That should also rule out volume matching issues, I did not alter the volume when I swapped the cords. As so often, it's a pretty subtle difference, but not very hard to notice in this case. Confirmation bias is still a factor. I didn't expect to hear a difference, but was hoping I would. Also, there are additional differences between the cords besides the claimed wire gauge. Edit: I listened for differences with the MrSpeakers Ether Flow and the standard 6ft 4-pin XLR DUM cable.