I was given the FXA2 as a gift late last year, and the left channel has died on me.
Also, the plastic housing for the MMCX connector on the cable simply cracked open when I was trying to replace the cable. Not sure if anyone has had similar experience, but the MMCX connectors on this IEM seem extremely (and unnecessarily) tight.
In the end, I don’t think the connectors on these earphones are put together that well, not to mention that MMCX is a terrible standard in the first place.
Unrelated to the build, I also had a chance to try the entire line-up of the Fender FXAx series (except the FXA9 and FXA11), and was actually pretty disappointed. Treble seemed a bit too aggressive on all the models above the FXA2, and I personally felt other options from AT, Sony, iBasso, etc provided the better value.
The FXA2, with its smooth sound, rolled-off treble, yet great imaging, actually makes the most sense as a stage monitor. And I do see how the emphasised bass works well for bassists and drummers, plus isolation is really decent. But my bad experience with the build makes me hesitate; I think I’ll be more confident in a 2-pin connector for a stage monitor from now on. While seems unlikely, I won’t mind if Fender / Aurisonics adopts a 2-pin connector instead. If they do, I think I'd be happy to give their future IEMs a try again, since I did like the FXA2 a fair bit while it lasted.