I have GS849 Penon cable with ISN H50 iem and the sound is thicker and less harsh in all frequencies vs the stock cable. Of course that the cable doesn't change the iem totally but refines it . And sometimes changing the iem is of course a better solution. There are folks which can afford many cables and check what's they found which fits best to the specific iem weaknesses and strengths. About the P8 I asked personally someone who has the P8 and many cables and he said that after checking many cables he found that the stock cable in this specific iem suits best.No disagreement that you can find audio nirvana with cable / IEM (headphone) synergy! But the odds are low, search is long, and cost is high! To each their own, but I think most will get close(er) with EQ, and for a whole lot less…
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