What interconnect did you make? My recommended recipe does not call for a "shield". The part # at mouser that you noted has a couple of materials that I have found to degrade sound in a high resolution system:
1) stranded copper (solid core thin gauge copper or silver will reduce skin effect and limit "time smear", in addition to avoiding the "strand jumping" and diode effect that you get with stranded conductors": see Magnan's site
2) the jacket is PVC, which has a significantly higher dielectric constant than Teflon.
3) I have found coaxial designs to be inferior to twisted pair or "helix" type designs.
In my experience, I have found that low capacitance, thin ga., unshielded IC's to be optimal- at least in MY system.
Did you actually make or listening to the IC recipe on my site?
I have yet to have anything less than glowing reviews of this IC, which is why your comments puzzle me.
Good luck on your project, I hope it does well for you
