Well, last night, or this morning very early (2:30am, France, Paris), I finally broke the code:
FiiO "FH9 - green filters - PQ mod" (Tips "Canal Works 肉球 Gel
Narrow Bore" L / FiiO cable "LC-RE Pro 2022" 8 cores, balanced
No doubt the beneficial effects of champagne, but I suddenly had an epiphany.
For the longest time, I couldn't understand why the
Canal Works 肉球 Gel Narrow Bore tips worked excellently with all my intras.... Except the Fh9's
Very bad, because when it works, these Narrow bore tips version are by far superior to the Wide bore version (all criteria, and notably the extent of the bandwith - especially at the bottom end : rumble -, it's texture, impact - percussion, transients - and definition ; the sound is more "concentrated" - focus - and more "solid", physical.
I had the answer under my (long) nose for a long time, but I didn't see it...
That was true in 2022.
So here is what it looks like:
The silicone wedge (ring)... which allows to have the optimal insertion on the cannula :
The tip's cone tip must be flush with the start of the cannula (exactly as with the wide bore cat's paw) :
Another view with all the players of success: cable FiiO "LC-RE Pro 2022" 8 cores, symmetrical (excellent), PQ Mod (the same) and therefore tips "Canal Works 肉球 Gel Narrow Bore" L (bravissimo). And the green filters on (perfect).
Results?
There we obtain an iem always so balanced and alive and powerful... but on the other hand the low comes to leer towards bass-head territory (texture, density, rumble, dimension, tension impact !...). The lower midrange is also reinforced in the same directions. On the other hand, for the high registers, it is always as limpid as before but even more focused and solid. Separation at the top. Breathing, extension and texture of the midrange and treble. In short, a faultless restitution and the FH9 are magnified. Finally, the sound isolation is better than with the wide bore cat's paws (hence a "boosted" bottom end according to what it is described before).
In order of importance and impact on the restitution of the tweaks described in this message :
1/ Tips
2/ "PQ mod" (over filtering of the decompression vents ; value 500)
3/ Cable
Of course, one must then reason in globality because everything is important. But it is obvious that the most tangible
improvements (and not just differ
ences) are in the tips.
That's it...
Now I've done the trick (I also compared cables - Aoraki and Graphene and Tianwaitian, with adapters to MMCX -, but weary, the best choices for me remain... the stock cable (excellent), and thus this optional hybrid copper, silver, gold cable "Fiio LC-RE Pro 2022": all criteria, RAS, uber excellent).
And so a very good year !!!