I listen to PK 1 on yesterday. Roughly, i think the improvement form PK1 and Pk2 is details and soundstage. I feel amazing on soundstage on ear bud of pk1 and 2. The main thing is Pk1 need more power to drive in order to get full performance you need to use amplifier. I have tried PK1 with herculis. i say one word " Amazing " This is my comment and maybe corect or wong so you should belive your ear
I listen to PK 1 on yesterday. Roughly, i think the improvement form PK1 and Pk2 is details and soundstage. I feel amazing on soundstage on ear bud of pk1 and 2. The main thing is Pk1 need more power to drive in order to get full performance you need to use amplifier. I have tried PK1 with herculis. i say one word " Amazing " This is my comment and maybe corect or wong so you should belive your ear