Fplanner2000, I'm sorry but I don't think you are 60% broken in. I have over a thousand and just experienced a big improvement, that I initially thought was on a preamp I'm using. When I went back to my old preamp I discovered that it too had greatly improved. Nothing else was changed in the system. I have never experienced something like the HFC Ultimates. I really wouldn't be surprised if a year from now I experience a further breakin improvement.
I once was told that Lowther drivers take six years to breakin. I can believe it as two years were clearly not enough.
I once was told that Lowther drivers take six years to breakin. I can believe it as two years were clearly not enough.