Just test line out of X3 with my two systems
The main system, I connect X3 to Harman KardonHK-990 integrated amp to Martin Logan Vista. I think sound will be on par with entry level CD player such as Marantz 6004 or Rotel 1072. But it completely unfair to compare with my Cary Audio CD-303T Professional ($6000)
Then I try X3 with Onkyo 876 avr / Wharfedale Denton speaker. This combination much more better, even better than when I play CD from Pioneer BDP-LX71 player. Very fluid and relax sound.
I fall in love with this cheap gadget and can't wait for X5 then X7 to come.
I hope I can have the speakers, lol, it will be so expensive if it is available in China . what a great combo.