1. How many drivers does FH1s have?

A: The FH1s' audible unit is composed of a Knowles balanced armature driver and a 13.6mm super-large dynamic driver. The 13.6mm dynamic driver is made of a bio-polymer diaphragm being driven by extremely robust N50 high magnetic circuit system, giving you powerful yet quick bass as well as crisp and clear drums for a striking overall sound. The FH1s' Knowles 33518 BA driver is located near the front (closer to the ear) of the body, which reduces high-frequency sound loss and thus improves treble extension. It plays its high frequencies through a brass sound tube, which reduces unwanted resonances and gives the higher frequencies a sense of realism and tactility you can really feel.