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Really great one, indeed!
I feel the same about the tonality. They are at least on par with the f9s - and lovers of a fuller signature will love them.

As usual, excellent review. What is your opinion of these vs the Pinnacle P1? I'm looking for something with more sub bass than the P1, as I like to listen to classical organ and the P1 don't reproduce the very low frequency notes that well. They're great for most everything else.

Really like the way you do the scoring, including the weight; which could show the aspect importance to your view.

Great review. You sold me, just placed my order with Fiio!

As always, a great review, Paul! Now that I have these IEM's myself, I can say that everything in this review is basically 100% spot on!

Thank you again for recommending these to replace the Trinity Deltas that I lost! The FH1 are one of the best audio purchases I ever made.

My stock earphones broke so I'm choosing between FH1 and Sony XBA-A1AP. I have a hunch that according to ISO volume graphs, Sony's bass will supress all the treble on certain volume levels. In FH1 thw amount of bass is even higher but the treble is also accented. My question is what is the behaviour of the treble when you increase the output?