pietcux
Headphoneus Supremus
Interesting observation and testament to the fact that tastes are different, which is a good thing thing. I have never experienced any harshness in trebles in the Z1R, if anything, trebles are to recessed for my taste. The HP I listened to most aside from the Z1R is the Beyer T1, which is a totally different ballgame when it comes to trebles.
I have the Sony Kimber cable too (bought it very cheap on eBay), but I found that it made the sound a bit darker than the stock cable, which was the opposite of what I tried to achieve. I am very happy with a silver cable that elevates highs a bit and makes the bass more controlled. There are many silver cables out there and I have tested two: Lavricables and Moon Audio Silver Dragon. Both very similar and especially the one from Lavricables is a bargain at EUR 200 for 2m.
Kimber cable does look great indeed though!
I had the Sony/Kimber for my Z7. It looks great, is mighty stubborn and sounds a bit different. But did it sound better? No just a little different.