A while back, somehow I came across @atmasphere numerous comments about Mogami wire / XLR. I have all Ayre equipment - QB-9 Twenty DAC, KX-5 Twenty Preamp, VX-5 Twenty amp with Wilson Audio speakers. If Ayre equipment isn't balanced, I don't know what is.
I use Mogami 2549 (2 conductor) cable with Neutrix connectors between all of it, including longer runs in XLR to dual subs. If I experienced noise (which I don't) I would use the quad conductor Mogami - 2534. The 2549 has much lower capacitance. I've found it via "World's Best Cable" in various lengths and the construction quality appears high.
As for me and what I've experienced, this XLR interconnect issue is settled. Another friend with 3 separate "megabuck" systems in his home has found the same.
Ralph @atmasphere - Thank You for taking the time to share thoughtful expertise, as I've seen you do many times in the past. You're helping people you don't even realize you're helping, and I'm sure many others are also appreciative.