One of the five drivers in this earphone is a sliver of silicon
PowerGo’s Aurora 03 runs five drivers per side, and one of them breaks the pattern. Four of the five make sound the way earphones always have, with coils and diaphragms doing the pushing. The fifth is a MEMS solid-state driver,…
We haven't written up this one. The Gadgeteer has the full story — the link below goes straight to it.