I am currently using Cardas Golden Reference XLR ICs between CDP (Marantz SA11)-Pre and Pre-Power (BAT VK-42 - VK250). My speakers (MA PL300) show significant difference when I A/B compare GR with other ICs currently sitting on my shelves (Atlas Navigator XLR, Kimber Hero XLR). The sound with all GR ICs in the signal path is much clearer, instruments are well separated and detail is first class. To be fair, GR is also a more expensive IC.
High frequencies are coming very crisp, razor sharp out of PL300 ribon tweeter with GR ICs. I may even try to insert Cardas Golden Cross speaker cable (or something similar) to "unsharpen" the high frequencies just a little bit. It is not that the sound is bright, not at all, but I could do with some fine tuning to suit better my music taste and age
My current speaker cables are Kimber 8TC, biwired, again less expensive then Golden Cross.
The bass and midrange are just perfect with GR in my system. I certainly had ICs that gave me more quantity of bass, but I have never heard such a good bass definition and resolution in my current setup. My room is far from perfect (marble floor, a lot of bare walls and glass) and GR swiftly removed slight boominess in the bass that big PL300 speakers are famous of in a not-so-perfect or not-so-huge room.
When I put back one Atlas Navigator XLR instead of either GR XLR IC, the sound becomes too soft and with insufficient resolution, so I do prefer the GR by a large margin. I can notice the difference clearly.
The Golden Presence should be having the same character as GR due to very similar construction (see Cardas Web site). These are all copper cables. Hope this experience helps, regards from Abu Dhabi.