The Z5's reproduce sound PERFECTLY because they have the skillful precision and power to deliver texture to each sound across the frequency spectrum whether it's treble, mids, bass etc. so that you can not only hear the music but also FEEL every sound, the same way you would in a live performance in real life from your favorite artists. You must understand that sound is a 3 dimensional force that you can FEEL as well as HEAR. There is a reason why you can FEEL the vibrations from a cello and FEEL the booming BASSLINE from the guitar. Sound is POWERFUL and it can be FELT as well as HEARD. The Z5 was designed with magnesium and metal which are strong materials so that they could displace air and reproduce sound PERFECTLY with AUTHORITY and with NO distortion. The Z5's drivers which include both balanced armatures and the dynamic driver were tuned to perfection so that they reproduce the SOUND from the source they are given PERFECTLY.
These are the gold standard of SOUND REPRODUCTION.
Use the upgrade cables and the balanced cable for an end game experience. In other words, the MUSIC is finally brought to LIFE and SET FREE. AMEN.