The digital value is a real voltage not a magical 0 or 1 (those are just abstract definitions for different voltage states - Signal over wire, or magnetic states - HDD, or electron stats - SSD). That voltage in a wire can be influenced by RF/EMI generated from other electrical components in the system. Rob has extensively explained through his listening tests that when there is extra RF in the signal it alters the sound. I'm not going to be able to verify or dispute his technical listening tests, but it does play out with what I hear in some gear. The assumption that data is data is false in our physical world because digital data is simply a sampled representation of a physical thing, which has endless possibilities to be influenced by other physical things, be it solder joints, poor S/PDiF port implementation, cable impedance, extra RF noise, etc.. If you can't hear a difference then that's great for you. No need to discount what others are hearing. Rob has posted this extremely well written blog post about listening tests. It's a recommended read. - LINK -. You can also read about his take on such matters in the third post of this thread. I'm not going to hold your hand and spell it out for you. If you disagree with what he says then that's fine, not everyone has the same perspective. There is a definite difference feeding the Mojo from my AK100mk2 vs the AK240 or the X5ii (these latter two sound pretty much the same). The Ak100mk2 sounds more brittle, tizzy, harsh. It's easily noticable and unfortunate for me because it's what I WANT to pair with the Mojo. These are assumptions you are making.