I tried the 50 ohm version and it really did improve the sound quite a bit. This doesn;t surprise me as I think that the stock hiface BNC is 50 ohm, you can tell by the size of the dielectric surounding the TX pin, the stock hiiface BNC is no where close the dimensions of a true Amphenol 75ohm connector (Amphenol is a trusted brand.) I suggestion anyone swap the hiface BNC for the Amphenol version, also the pulse transformer for the Scientific Conversion, and last add the attenuator (75 ohm) prior to investing in a $500 digital cable. I'll never spend that much on a cable but it just makes sense to cover the basics first.