FiiO FA9 Six Knowles Balanced Armature IEM

The FiiO FA9 Six Knowles Balanced Armature IEM is a whole new level of sound with the 6 Knowles BA driver custom setup. They have 6 Knowles BA drivers per ear, together with the carefully-designed 4-way crossover and low-frequency ultra-long sound tube, completely covers the entire audible frequency range with a sound that will take your breath away.