The CustomArt FIBAE is a high-end six-driver IEM with the world’s first Flat Impedance design (patent pending). The result of months of hard work and countless hours of testing, its frequency response is closely based on that of its predecessor, the Ei.xx, with improvements to accommodate feedback from the Massdrop community. Each ear features two sub-low drivers, a single low driver, a proprietary mid-high driver, and two high-frequency drivers, which work together to deliver a fun, powerful sound. It’s thick bodied and bass focused, with deep-reaching sub-lows, a balanced midrange, and smooth and detailed highs. The Flat Impedance Balanced Armature Earphone (or FIBAE) technology helps provide a uniform sound signature independent of the connected source, and thanks to the more versatile tuning, this IEM is well suited for a wide variety of music genres.