The Mg IEM utilizes a high magnesium content alloy (96% Mg) for the diaphragm material. All components inside our IEMs were 100% designed and tooled in-house, resulting in a totally unique product. The sonic signature of the Mg IEM is relatively neutral but with a brighter top end than our Be unit. Many people prefer this sound for use in noisier environments. All our IEMs feature polycarbonate bodies for high strength and zero resonance, custom front-and-rear tuned volumes, MIM logo caps, butyl rubber strain reliefs, and N48H grade magnets.