Interesting post Tony, I've mentioned this a couple of times in other areas of the forum but I'll reiterate it here anyway.
It's been awhile now since I heard my Triple.Fi's with the stock cable but from my recollections your sonic impressions mirror my initial impressions of the Triple.Fi's. I didn't own this pair initially, they belonged to another local Head-Fier who graciously loaned them to me on a few occasions. My first few listens with the stock cable and Comply tips I felt I had a love hate relationship with them, I found the bass quite good, decent extension and I quite liked the midbass punch on certain albums like Muse's "Black Holes and Revelations". The treble I generally found decent and liked the added extension it seemed to have over most other IEM's I'd heard but it was just border line on the sibilance front. Mids as you noted were the real downfall for me as well, too recessed giving vocals a distant quality and instruments sometimes got lost. Overall my initial impression was good but others like the 530's, W3's and even to a degree the IE8's I'd have to put ahead of them for my preferences.
I'll admit though, the bass kept me coming back, I tried that pair one or two more times in their stock form because the bass was quite addictive on those albums where it really worked. Unfortunately they really failed horribly on other stuff, especially more acoustic oriented albums where the recessed mids seemed to just suck the life out of the music.
Then the previous owner for some reason even though he was having fit issues decided to try an early iteration of the Null Audio cable. When I gave them a try with the new cable I was eventually won over. With this cable the bass seems to be reduced just a tad, it doesn't seem to have quite the magic it did previously on those certain albums but overall it integrates more seamlessly with the rest of the spectrum. Treble, or at least the area where sibilance is predominant is reduced or cleaned up enough that it's not been an issue, sibilance while still there sounds natural now. The mids are brought up a tad and like the bass seem to now better integrate into the spectrum. Overall, the recabled Triple.Fi's are now one of the best balanced phones I've heard my only real gripe with them at this point is they still tend to sound a tad dry in comparison to something like the IE8's or my HF-2's. I ended up trading for this pair and have found myself having very little interest in trying anything else (other than JH Audio 13's, they're my only real temptation at this point
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
).
It's a bit odd, I listen to the Triple.Fi's the most by a long shot because I use them predominately at work and don't get a lot of time to listen to the HF-2's at home. Yet over the Christmas holidays when I've had the chance to listen at home I've found myself reaching for the Triple.Fi's instead of the HF-2's. I'm not quite sure what that says.
I should note, I don't want to advocate for an expensive new cable though, this particular cable seems to have worked for me but I know it's not the same as the cables now on offer at Null and I have no idea if those would have the same effect.