I just acquired the Sony XBA H3. Before owning the H3, I was using the Sony EX1000 IEM for about 9 months. The sound quality are quite good overall. I like for its bass sound quality and the Mids are adequate. The treble are good but roll off.
Now, for the XBA H3, it's a monster compared to the EX1000 period!! After listening to the H3, I'm not going back to the EX1000 maybe for good? The first thing that the H3 impressed me was its much wider and depth sound stage!! It can pushed the high notes much much higher on the curve. Due to this, now the high notes have sparkle treble but not piercing treble so to speak.
The H3 excels in presenting the singer's voice in full rich details and it doesn't stopped there. It projects the singer forward...slightly in front of you and elevated. The bass has more fuller bodied to it. It can goes deep, impactful and fast when the music calls for it. It is not a bass-head type of IEM however.
No doubt, this H3 is a high quality IEM that deserves some serious attentions from music lovers or audiophiles alike.
To me, Sony has combined the EX1000's 16mm dynamic driver with the armature drivers of the XBA 4 and improved it and made it better.