@toetapaudio, If you have not read this Audiogon Forum you should read it in its entirety, it is short but somewhat interesting:
https://forum.audiogon.com/discussions/shielded-power-cord-best-used-on-digital-source-or-on-tube-am...Yes, the DPS-4 is somewhat new, it's been out for several months.
Some of my Furutech power cords were made with the NCF connectors and they are very good, I have other Furutech power cords that were made with a much less expensive connector (Set Copper Rhodium Plated US AC Power Plug Carbon Fiber Connector Adapter):
http://www.ebay.com/itm/1-Set-Copper-Rhodium-Plated-US-AC-Power-Plug-Carbon-Fiber-Connector-Adapter/...I don't mean to start any controversy however I could not tell a difference other than in my checkbook.
The FP-TCS21 or FP-TCS31 is more laid back vs the PF-SO22N is more forward and detailed. I own an FP-TCS21 (14 gauge).
Most of the Furutech power cords I own were built for me by Mike Kay of Audio Archon in Illinois, a very nice and very knowledgeable audiophile and store owner.
BTW; I am not affiliated nor do I have any financital interests in this hobby, just trying to pass on a good thing to others.