The FRD is with mic, for smartphone use. I have both, generally they sound the same, the FRD is slightly more V shape in tonal balance compared to FXD.
Congrats! Despite of other more expensive earphones I have, FXD80 is my favorite!
FXD80 improves with burn-in. I use regular songs, I take only one channel of the song using Audacity, so I burn-in with mono track, so left and right driver get equal treatment. I have 2 FXD80, so I did some experiment before, burn-in one pair for 4 days, leave the other pair as new pair.
oh wow that answers MY QUESTION haha but how did you find the driver flex between the two? is one considerable worse over the other? everything looks amazing so thats what concerning me
is the bass more in quantity? in the midbass, subbass?