02-01-11: Jazzgene
@Tholt
How did you come to the conclusion that 2534 has more shielding than a 2549?
I remember reading about this issue in various places on the web, though now I can't recall where exactly. Perhaps what I meant was that, as you stated, the 2534 is a quad cable while the 2549 is a twisted pair. The thing that stuck with me was that 2534 should be used in areas of high interference. If this situation doesn't exist, use the 2549.
Anyway, here is a response I found on the Gearslutz forum by a Mogami rep to an inquiry about the differences between 2534 and 2549: "I do recommend 2534 anytime noise is the most important issue while being as transparent as possible. That is what we use in our Gold Studio cables. As I mentioned noise intrusion is often more noticeable when recording that last decibel above human hearing. If noise is not a big problem our 2549 is actually world class for a twisted pair noise rejection, and the golden ears among us can hear the difference in fidelity compared to the slightly softened transients of a quad. But we are definitely comparing subtleties here."
There is more info on the Mogami website for these 2 cables.
I have never heard 2534, either in balanced or SE, so can't comment on the differences from a personal experience.