Here's my theory on the DPS "edge". I have heard other reviews that conclude the cable is "analytical" and using too many of them will make the sound edgy, others that think it's warm.
I think it's the intermediate sheath that's in between the wires and shield, there's this black tube of soft rubbery material that has carbon/graphite and possibly other things added to reduce or absorb noise, Furutech has been offering demag/antistatic devices for cds and lps for a very long time and I think the NCF and GC-303 materials are looking to achieve the same goal, at least in part, they also reduce noise in other ways that are easily measurable with an AC power quality meter. In any case, I've heard other cables that use graphite, claims of graphene, etc and heard some similar things, with the DPS I believe it creates a "bloom" in the upper mids to lower highs that is somewhere in between copper warmth and tube warmth, but depending on other factors I think this same bloom can come off as edge. I've heard it more along the lines of @John T and would agree with "silky smooth" and "refined", imo it comes across as a bit pleasantly colored and warm overall. But AC power can be kind of odd at times and I think there's another factor in the system that may turn that bloom into edge. For the new V1 I think Furutech has likely a new better version of this black carbon impregnated material used in the DPS and the silver plating will make for substantial differences in SQ as well.
I think it's the intermediate sheath that's in between the wires and shield, there's this black tube of soft rubbery material that has carbon/graphite and possibly other things added to reduce or absorb noise, Furutech has been offering demag/antistatic devices for cds and lps for a very long time and I think the NCF and GC-303 materials are looking to achieve the same goal, at least in part, they also reduce noise in other ways that are easily measurable with an AC power quality meter. In any case, I've heard other cables that use graphite, claims of graphene, etc and heard some similar things, with the DPS I believe it creates a "bloom" in the upper mids to lower highs that is somewhere in between copper warmth and tube warmth, but depending on other factors I think this same bloom can come off as edge. I've heard it more along the lines of @John T and would agree with "silky smooth" and "refined", imo it comes across as a bit pleasantly colored and warm overall. But AC power can be kind of odd at times and I think there's another factor in the system that may turn that bloom into edge. For the new V1 I think Furutech has likely a new better version of this black carbon impregnated material used in the DPS and the silver plating will make for substantial differences in SQ as well.