As to your other questions, Cores are really a comfort/aesthetic preference thing over any tangible benefit IMO, and pretty much anything made nowadays that isn’t exotic is going to be .78mm 2pin, MMCX or QDC. 2pin is the most “compatible” of the types, and can typically work with QDC and, depending on the hardware, will work with flush or recessed connectors regardless.
I actually haven’t run an A/B on the Copper/Silver vs Graphene, but I can do that later tonight. Again, in my experience across many IEMs and cables, I have never found the material itself or type of cores/braid to make any difference that I couldn’t chalk up to placebo. That being said, an excuse to listen to my MEST more means that I must undertake this, science demands it!
Yes, 2, 4, 8, 16, 24 core only matters to the looks and thickness, doesn’t affect the sound. Material wise, some would suggest that different materials will sound different, but most likely it’s due to the different impedance. One must have exceptional hearing to be able to tell the difference; most of the time it’s just placebo.
In terms of UM MEST, I also have it but it’s QDC (rounded edges) rather than NX7 (sharp corners), no?
2-pin is the all-compatible, but if you’d like to cover the sockets of MEST, QDC is the better way to go. I’m not sure if NX7 would fit (probably will but I wouldn’t risk it).
Oooooooh, man! Thank you so much. my current pins are the QDC 2pin, and im so relieved to know for certain what to do. If you find a difference in the graphene vs copper, I will keep my ear down and go from there. But you have been so helpful, you have no idea.
Ah fair enough, usually my recommendations would be to get something from PWaudio or Plussound to name a couple.
Personally I would recommend replacing the cable with something of similar quality that goes for the sort of sound characteristics that you are looking for out of your IEMs. But the vocal majority tend to disagree with that here