Check out John Darkos review. He prefers the JKMk3 to the AP2 with the Octave, It's smoother and less digital.
I have the JKmk3 with my Octave fed by a 2011 Mac mini using Bitperfect or Audirvana plus up sampled to 176khz and it sounds great.
I have the JKmk3 with my Octave fed by a 2011 Mac mini using Bitperfect or Audirvana plus up sampled to 176khz and it sounds great.