The new high performance IEM is just come out – HE-DBA7, it is kind of reference-grade neutural sounding design by advanced 7 hybrid drivers technology. Not just “more drivers” approach to DBA5, DBA7 uses IPP (Independent Pipeline Purify) acoustic technology that it early applied to AURORA, IPP reproduces precise frequency phase, especially to improve phase shift between hi and low-freq. More drivers does not mean enlarge, improved and high ergonomic resin casing makes DBA7 more lightweight and close-fitting.