Improvement over King Cobra, both very good
I had been using an AQ King Cobra between my NAD M51 DAC and NAD T787 AVR in my main system. The King Cobra was a significant improvement over my prior cables, for mid-range clarity and solid bass, but was just a bit too laid back for the rest of my system and room, and I knew that at some point I'd want to make a change there. When I got a Bluesound Node for my basement system, I tried several combinations to get the streaming to my NAD T757 AVR down there. Analog out from the node wasn't cutting it, nor was optical direct to the T757. Neither of those DACs did much for me. So I tried popping an NAD C565 CD player in between, using it as an outboard DAC. The Wolfson DACs improved things dramatically. So, to kill two birds with one stone, I moved the King Cobras downstairs to go from the C565 to the T757. And got the Columbia for the living room, from M51 to T787. Two upgrades with one new cable. However, at first I was more than a bit underwhelmed with the Columbia. While there was some subtle improvement in clarity, especially vocals, it didn't provide the WOW factor I was hoping for -- until I had it for a week or two. When it was fully broken in, my PSB Synchronies began to sing. More life than the King Cobras, incredibly black background, and probably a better fit as the back side of an increasingly digital system. For an analog system, in a cozy environment, where "warmer sound" is preferred, the King Cobras would be more than adequate.
Pros: Clarity, dead black background, "lively" though accurate, solid throughout the frequency range, not too warm & not too bright
Cons: price, but if just need 1m it's not ridiculous -- well, yes it is, but they do sound good!