https://alclair.com/monitorshop/electro-electrostatic/ Alclair Audio has produced the first in-ear monitor that features electrostatic drivers with an internal transformer. The Electro six driver electrostatic hybrid in-ear monitor is built for dazzling clarity with four balanced armature drivers and a dual electrostatic tweeter. While designed for studio and audiophile customers, the addition of dual low end drivers provides plenty of headroom for stage applications. Actually came across these by accident while looking for a website with a decent CIEM designer. Haven't been able to find any information about it. @Deezel177 had mentioned he had contacted Alclair about it, but so far no luck. ~edit - I contacted Alclair and they quickly responded that there is one out for review and it should be appearing here on head-fi in the next weeks. Additionally, they did state that their main market is studio & live musicians who don't usually post reviews, but the response so far has been positive.