Thanks for this response. very useful. I have not tried any Sony MMCX IEMs yet. But I have bad experience MMCX based IEM. I was successfully able to change cables from my Andromeda only 3 times over 10 months period. The fourth time I broke my nail and mmcx connector on the shell broke off and I had to send the IEMs to re-shell. So now I am thinking of focusing on 2 pin based IEM manufactures, may be I will go for noble, empire or 64. But based on your posts from this thread, I see you get good match Sony with Sony. I only prefer to stay with Sony DAPs. So I am thinking of considering IER-M9 too. If I ever feel to need change cables to alter sound signature, but MMCX connector gets brake again... the fact is worrying!