Higher/ultra-high frequencies: handled by the SWFK-31376 driver that blends extreme resolution with rich sound
Mid-frequencies: EJ-33877 custom driver collaboratively created by FiiO and Knowles, with powerful mids that give lush vocals
Lower frequencies: HODVTEC-31618 driver, with 2 woofers that produce dynamic and authoritative bass
· S1 switch on: lower impedance and higher sensitivity, making the FA9 easier to drive
· S1 switch off: higher impedance for a more clean and natural sound, with a darker background and lower audible noise from the source
· S2 switch on: treble boost, perfect for those seeking more highs and for rock music
· S2 switch off: treble normal for more balanced tuning, suitable for most types of music
· S3 switch on: reduced bass and increased mids, useful when listening to human voices and musical instruments
· S3 switch off: increased bass and reduced mids, good when listening to classical and orchestral music
The included 8-strand monocrystalline silver-plated copper cable gives you excellent sound quality out of the box, so you dont have to worry about upgrading to a better cable.
6 Knowles BA driver custom setup 3 sound adjustment switches 8 possible sounds 8 strands of pure audio cable