Xiaomi ProHD.
How does it sound?
Paired with AK 320: it sounds natural with wider sound stage compared to my other iems (Little bit above average) clear mids especially on vocals, detailed mids and highs, non sibilant, with enough sub bass presence (non overlapping) and punchy mid bass.
Paired with FiiOx7 on am3 module: a bit musical, fun sounding and engaging sound signature. Crispy treble and tight bass punch. Still controlled non overwhelming. Luscious vocals at par with AK 320. Wider sound stage than AK 320.
With Sony ZX100: Without amp the volume is maxed out. And just enough for my volume limit. It's flat and very natural sounding pair.
Sony ZX100 With eo6 amp:
A definite step up in eq. Switching different sources for comparison I could place it in-between the AK320 and FiiO X7.
FiiO X7 with iDSD Black Label:
This is where it shines the most. With black background, zero noise, superb clarity and very detailed in all spectrum, very wide sound stage for an iem both width and height. This set up did justice to its name...
The Xiaomi ProHD
Needless to say, it's a source dependent IEM, yet a very capable one.
Beyond my expectations considering its price.