FiiO FH1s Hybrid In Ear Monitors

Dual Driver Hybrid (DD & Knowles BA) Earphones
Knowles 33518 Balanced Armature with a Large 13.6mm dynamic driver
Balanced pressure relief technology with a friendly HiFi tuning for popular music
High purity monocrystalline Litz copper cable with unique celluloid faceplate

On a never-ending quest for improvement
The FH1S is newly developed earphone that takes as a base the original FiiO FH1, itself highly acclaimed by many in the audio community, and further improves the sound to greater heights.
Compared to the FH1, the FH1S has a bigger and improved dynamic driver combined with a Knowles balanced armature driver for truly deep and revealing bass, astonishngly clear mids and highs, and truly moving lush vocals.

Knowles 33518 balanced armature driver For exceptional treble and sweet vocals
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. The knowles BA drivers 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.

Large 13.6mm dynamic driver
Excellent low-frequency transient response and low distortion
The FH1S' dynamic driver is made of a bio-polymer diaphragm being driven by extremely robust N50 magnets, giving you powerful yet quick bass as well as crisp and clear drums for a striking overall sound.

Precisely tuned balanced pressure relief technology
While the large 13.6mm dynamic driver on its own provides high quality deep bass, when combined with our patented balanced pressure relief technology we unlock even more of that driver's potential! The precisely tuned balanced pressure relief system equalizes the air pressure in the front and the back of the body, greatly enhancing the soundstage and reducing your ear's fatigue when listening. n provides high-quality deep bass, when combined with our patented balanced pressure relieved technology we unlock even more of that driver's potential!