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KZ gold & silver plated 8 core copper cable on a TRN MT1 Pro paired with wide bore horn tips and, tuning spacers. This was an exercise in tuning, on the cheap. And/or to just prove, that all is not the mythical snake oil.
I don't care what anybody says. In an a/b with the EDX Pro, the MT1 Pro comes out a winner hands down. These MT1s even without the mods, are audibly better in every single aspect, tonally and technically, vs the much hyped (guilty myself) EDX Pro which was quite unnatural in the mids, to put it mildly. The bass guitar on Smooth by Santanna & Rob Thomas sounded like it was phase inverted, through the EDX Pro! Get the EDX Pro if you wanna experience this, lol!
This MT1 Pro, is very natural sounding, something that can never be said about the EDX, although I wouldn't say the EDX is bad, and works very well with music genres like EDM. The MT1 on the other hand, seems an all rounder. Better bass extension in the MT1, almost sub like. Better soundstage. Audiophile mids. The resolution in the highs is good enough to be able to differentiate the varying levels of decay of cymbals between multiple tracks.
The cable upgrade definitely improves the sound. All this being audible even without (or with) an A/B comparison of (three) cables and ceteris paribus. Although now I'm kinda wishing I just got an eight core without the platings. Personal preferences.
Tuning spacers used to space out the wide bore silicon eartips from the base of that longish nozzle on the MT1, in order to place the tip of the nozzle deep inside the eartip giving it a "deep insertion" horn like configuration. End result, a deeper soundstage, sub like lows down around 20Hz, with tasteful highs that don't bite.
All in all, after not so cheap a total for all mods and accessories trying to tune the EDX and this MT1, relative to the cost of the IEMs themselves, and a lot of patience in watching the shipping logistics at work, it's amazing to see how much of a good sound can be had without having to rob a bank or sell half a kidney.