i think the reason is lack of damping and stuffing too much BA drivers inside that are cheap and low quality, the bass driver is the best inside that thing, but the lack of damping and poor driver matching are the main reasons in my opinion
also bad crossover implementation is a possible reason as well
the new NX7 Pro can be improvement because it has some sort of damping from the new filter system
My question is if anyone knows if anything changes inside or just there are new filters in the nozzles, somehow, as I did when I put the tips Ostry ...