High and ultra-high frequencies: These parts of the frequency spectrum are handled by the Knowles SWFK-31736 BA driver, often utilized in top-of-the-line IEMs. This driver is extremely detailed but without being harsh, giving you natural, crystal-clear sound.
Mid frequencies: This is handled by a custom BA driver designed by FiiO and Knowles in conjunction with each other. We took the classic Knowles 30017 driver and tweaked it to give the mids more body, for fuller and sweeter vocals as well as a larger soundstage.
Low frequencies: The 13.6mm large dynamic driver is made of beryllium, known for being light, thin, yet extremely rigid for even deeper, explosive bass.