Purist Audio fluid cables begin opening up after about 200 hours, became acceptable near 300 hours and keep improving slightly after that I am not sure for how long, I don't have a high resolution system. After 300 hours or so wall current fluctuations affect sound more than new cables in my set up so I stop listening to them.
On the other hand, Tchernov Reference sounds quite good after maybe 50 hours but the end result is the same - 300 hours is a cut-off point.
On the other hand, Tchernov Reference sounds quite good after maybe 50 hours but the end result is the same - 300 hours is a cut-off point.