Wanted to do an update on the impressions and my opinions of the A83 and in comparison to the SM64 from earsonics. I feel that the A83 brings out the detail a bit more, which I can still hear with the sm64 but it is a bit warmer and so some times now as obvious. The SM64 are light and fit my ear shape better but I have not discomfort with the A83 to grip on, and the build quality seems to be holding up very well and is solid. Microphonics are present if you rub the part of the cable that is attached to the earphones, but you have to be trying to hear them I believe that do a much better job the some other IEMs I have listened to.
If I had to say if I preferred the A83 to the SM64, I would be hard pressed, they both do so much right and so little wrong, they both suit my preferences. The A83 being fantastic both tonally and with treble and bass keep up with the mid range. The sm64 having nice lows, great mid range, smoother treble but still having details, and having a nice sound stage. I feel with some music the Fidue just sounds the best, but It can go either way. It comes down to I am selling neither one and content not upgrading to something audibly better and more expensive for a long while.