I have a Focal Clear, Focal Elex, and a Focal Elegia.

The Elex is like pretty old, I got it second hand in 2018, the Elegia I bought in 2019, and the Clear in 2020.

As long as you're not man handling them you should be fine, but ..... there is a the hifiman head band mod and honestly if my headbands do go I would not be that angry as the hifiman head band is ubber comfy.

to my ears at least, I used the m15's on both of the earphones at the time and comply foam tips on the u6t.

I had issues with fitment on the silicone tips, but you can tell straight away that its a 64 audio iem, the targets are identical.

The Bass on the u6t had surprising had a good amount of quantity, i was honestly super surprised by this. the U6t decayed quicker than the a4s.

The A4s definitely has bass force, that the u6t didn't have. The mids where a little bit more present of the u6t, or they sounded closer on the stage, where as on the a4s its more relaxed.

The treble sounded similar to me, but its definitely elevated on both.

All and all they are both very good IEMs, I think the u6t is definitely more balanced, abit elevated bass, while the a4s is bit more fun.

The funnest of the bunch I tried was the Trio, its bass response is elevated and the female vocals are a bit closer on the stage(compared to the a4s), that iem really put a smile on my face.

Well it all depends. I really like crinical's IEM target and he mentions that the bass on the N8 was out of control.

the bass on the A4S, is heavy at times, i do switch between the mx and the m15 often enough when the bass burns me out.

64 audio tends to be a bit bass heavy in general but generally balanced. If you are coming from something like a moondrop blessing dusk ... you will definitely notice it..

I dont think you will regret the a12t at all, but unfortunately if you want a bass response that extremely dynamic from the 64 Audio line up, the A4s or the Trio are pretty much your best bet.

But dont second guess yourself, wait for the custom to arrive, and enjoy and cry because man their CIEM are super comfy and its hard to go back to universals.

Not OP, but Im waiting on a A12T IEM but I do have the A4s and I have tried the U6t, U12T, and the Trio before the sales clerk kinda gave me that look.

The BA bass on the U6T and the U12T dont slap has hard as the dynamic on the A4s, but man they still do slap and it 100% surprised me (seal had a lot do with this, i did a lot tip swapping in the shop to get that seal). I think in terms of the bass you will be 100% pleased with it