Yea the electric guitar is crazy. Sounding. And to be fair the piano , acoustic guitar even sounds amazing. Vocal too. Like there's no sharpness that hurt my ears. Some of the headphone I use sometime because the vocal gets too high like for IU cause of her voice and her amazing vocal range it actually hurt my ears. But this pair it doesn't.

But if I gonna upgrade maybe a better DAC. Cause the differences between the china desktop DAC and K1 is a big difference from what I am hearing and it draws more power for the suca audio.