I was using the Black for several years, and was very happy with it. I then started reading so much on the Furutech GTX D NSF R that I decided to try it even tho it needed 700 hrs of burn in to sound its best. I found the biggest change in the upper frequencies at 700 hrs.
I,d like to have someone who has heard both the Blue & GTX NCF version fully broken in units report back there findings. Im interested in the blue. I can imagine how the Blue UEF and Blue Fuse together would impact a system.
When I decided to try the Furutech the Blue UEF wasn't out yet.