Has anyone tried the WE 16/14/12/10 GA or the Duelund wire for power cables? How does it sound?I have made several of these and they sound great. On my big monoblock amplifiers I use a cross-connected quad run of the WE 10ga to the pos and neg poles (2, 10ga wires to each pole) and another two of the same wires to ground. On my preamp I use a simpler twisted pair of the 10ga (one wire each to pos and neg) with the same to ground. I have been using Furutech FI-11 (Cu) connectors with this wire. They compare very favorably with other manufactured power cords I own. In my system, the sound is full and tonally dense, similar to their wire used as speaker cables.
Regarding the design, I shield all of my cords, with the shield spaced away from the pos-neg wires and with the ground wire(s) counter-spiraled outside of the shield. One could argue the quad run is overkill, even for large Class A monoblocks.
Regarding who makes them, I believe this is the same wire used in the original "American Series" by TWL, for both power cables and speaker cables. I believe this wire was also used in power cords previously made by Mojo Audio.
Regarding the Duelund wire, I would not use their cotton-clad-only wire for power applications. The WE wire has a plastic dielectric (and then an outside cotton covering) and others have found that suitable for power cords, but you should do your own research on the suitability of any wire you use in power applications.