I've always sworn that cables " THEY DONT DO JACK!" Laugh all you want if you disagree , Clap all you want if you agree.
I've been a Sony then Denon user since the mid 90's and FiiO FH5 were my first foray into IMEs in over 10 years and my first IEM with removable cable.
When I bought the FH5 I looked at cables purely to go balanced and bought the FiiO LC2.5B (Hiby R6 only had 2.5) While the sound was louder coming from the LC3.5B cable, I still did not give any credence to cables.
So after the a long and hard battle with my audiohobo demons I gave in a bought the FH7 and then a few days later I relapsed and bought a ISN C16 4.4 MMCX cable
I've had the FH7 11 days paired with the LC2.5B and then today my Lovely looking cable arrived, still not a beliver.
2 hours later it could just be my wallet willing me to hear a change but THIS cable make a difference What.
I have been listening to music via the M11 on Low gain volume at 40.
I am finding that the lows are fuller with mids much the same and the treble ever so slightly tamed, what the feck am I talking about!!!
When I say fuller I meant that there is more notes to be heard in the bass and with the treble its still great just a little less but that could be due to my perception to the bass changes.
Its a nice thick cable with a quality feeling weave its a little stiff but fresh out the box so gotta give it some time on that front.
My only dislike with that cable and that is there is no ear hook but its not too much that its unusable over ear I might JUJ'it up.
Some of the music I enjoyed
Links to cables
https://www.amazon.co.uk/FiiO-LC-2-5B-Balanced-Earphone-Replacement/dp/B07FZWNRWK
https://penonaudio.com/isn-c16.html?search=isn
As I've said in the past I'm just a audiohobo and as such what the feck would I know But this cable gets the Audiohobo 2 thumbs up
Sorry to anyone I was a c-unit to in the past over this
This is great news Juj! And just what I wanted to hear. Copper is said to do EXACTLY what you're describing - beef up the low end, and slightly tame the highs, and if the FH7 needs any tweaks to its sound, those two are it. Going to get me one of these cables pronto!