^ tbh i thinks it's just driverflex. Both the Left and Right channels sounded like crap on the pair i auditioned with the stock tips. I was barely able to hear anything cuz the stock tips made so much squishy noises due to the bad seal/ driverflex. There was more than 40% loss in audio quality for me and only tip rolling was able to let me hear them properly.
The RHA MA350 tips i found is best for me when i experience driverflex, they worked like a charm for my set of FX3Xs that has this exact problem. After i applied those tips i still got the driverflex but it was able to make these bassos to sound right correct.
So my advice is to tip roll with everything you own and see where this gets you.
The problem is that the Left driver sounds low at any position I don't think that it is a tips' problem. Even without tips the left one sounds clearly lower with any type of music and/or source. Even without seal or any attempt to insert them. The right driver sounds great at any position.
In the case that is a driver flex how could I use the other tips since it's a problem of the one driver?
I don't know if you experienced the same problem for me the sound is kinda muffled and let's say from a great depth. It seems "clear" there but it's like there is a pillow over the driver.
I can't use both drivers at the same volume. I don't have many tips around and even with some really soft Samsung tips the problem is still there with no changes at all.
16hrs of non-stop burn-in and everything is still the same. If it's something simple that other members could fix with different tips or any other means I could easily sell them, I don't really want to invest more on these by buying tips that will be useless.