It sound like the Mac sound, as highly as it is thought of, is not known for its airy analytic nature. I own some old Mac SS amps that go well with my Klipsch LaScalas, whereas my various tube amps did not. It's not the cable, but if you want to try a more analytic cable try an all silver IC -Not silver plated copper. That'll cost you, even in fine gauges, but there are enough around. I used Home Grown but they are out of business.
Nordost Red Dawn Interconnects
Looking for audiophiles who are familiar with this cable to describe the sound. I am looking for a livelier cable to go from my McIntosh FM Tuner to McIntosh tube preamp. Currently using a cable that is a bit too warm sounding. Thank you.