I'd love to see a frequency response and impulse response graph comparison between an "open" BA driver and a closed one... I'm skeptical that Sonion and Knowles would close a balanced armature driver if it being open was better in every way as this seems to suggest concerning detail and eliminating resonance.
vik kash here is the pic of handover the tia fourte prototype from Vitaliy to me during Portable Audio Festival Indonesia, March 2017 in Jakarta. Before the mass product shipped to the market. The sound is different from mass product. facebook.com/photo.php?fbid=10210493686430746&set=a.1493134160637&type=3
