Hi, I just got the XP3 few hours ago. I was looking for a 'cheap' BA driver IEMs, for listening podcasts and lectures during my 1 hour+ commuting. I prefer clarity and forward sound signature.

1) Quickly I put my custom sleeves and screwed them into my ears.
2) Plugged it to iBasso D10 Cobra which connected to MBP via TOSLINK.

MBP -TOSLINK-> iBasso D10 ==? IEMs

3) I test with few test clips.
General impression
Bass: Good quantity and quality sub bass. Very nice bass punch.
Mid : Voice/vocal slightly laid back.
Treble : Laid back at 4-7KHz range. This make  oumph of the 'impact' and clarity slightly reduced. But, the higher end is good and sparkling.

Conclusion, compared to my reference custom IEMs, Unique Melody Mage (4 BA drivers) and other IEMs.
Typical 'popular' V shape sound signature, A little more forward mid should be nice.
Not as sensitive as UM3Xs and Mage, so need to cranked up the  volume. This reminds me the PFE 112.
XP3s are about the Westone UM3Xs with better treble.
XP3s have  better bass than PFE 112 v1, but laid back mid and treble.
Nice for watching movies.
Just sit back and enjoy the sound.

Even though this is 0 hour impression, ie not 'burned in' yet, the bass is superb, and perform very well.

I may update the review later.

Thank you.