Listening to the Z1R with the Kimber Axios cable for an upcoming review and I am quite impressed with not just the sonics, but the build quality is outstanding! The stock cable is quite mediocre with regards to sound quality, the Sony-Kimber cable is a good upgrade and really helps even things out (though maybe a bit too much in the treble region in terms of a reduced presence), but the Axios really hits along the entire FR range. I also have an Axios cable for the Focal Utopias that I will be including, but so far, colour me impressed!