I've said it before. It all depends. With my ARC Ref 6 and Ref 150 SE I tried six different XLR cables many on loan from a well-known PA webtailer and throughout a spectrum of price points. At the bottom rung price-wise were Mogami's and at the top were Cardas Clear Beyond. With these two components each IC cable between preamp and amp made a marked difference. The Cardas Clear Beyond was a clear winner. By a mile.
Disservice: XLR interconnects
I ended up shelling out some serious bucks and buying Cardas XLR interconnects and connected them between the Luxman C900U, M10X and the hifi Rose RS150B. I am blown away, at the details and just how it bumped up the sensation of just the beautiful musicality..
I have to say, I am no longer in the camp of cables don't matter. In fact, I think folks who say cables do not matter are doing a great disservice to the audiophile community.