TechPowerUp published a review on the 64 Audio Solo Planar Magnetic IEMs
64 Audio Solo Planar Magnetic IEMs Review
64 Audio enters the wild world of planar magnetic IEMs with the new Solo. It uses tech gained over the years and adds a novel implementation of Helmholtz resonators + electronic filter to make for the most controlled and smooth sounding treble of any planar magnetic IEMs I've tried to date. Add to this an open sounding presentation and unique aesthetics, and the Solo is a premium set that should interest many.