I'm still looking for good silver clad for ICs, mic cables, etc.. But I'm stuck on the audio quality bit and knowing that 'silver clad' != good sound. I also feel that you can't read the specs for a cable and know that it will sound better than cable that was specifically engineered and tested for use as mic cable, etc.
Another factor.. The quad connect that is good for mic cables may not be ideal for ICs.
Then there is the whole inductance issue. The 1804a has very fine 28awg conductors. That low inductance is a somewhat different approach compared to many of the cables in use. I've wondered how it would work for ICs.
I'm also still trying to settle on some good RCAs for IC projects. My instinct is that the heavy RCAs with lots of metal mass aren't a good idea. I wonder if some of cheap ones that are mostly plastic wouldn't actually be better than a lot of those. Obviously, you can spend pretty goofy money on RCAs. That's especially true if you want to build a few cables to compare. I find it very ironic that we only spend about $2 on XLRs. Granted, those are balanced cables so the characteristics are different. But I don't think the balanced config changes that connector issues all that much.
I have a bunch of cables to make (rca-rca IC, rca-xlr IC, mic cables)... FWIW, schoeps active cable is some pretty trick custom stuff and it is not silver clad.