The FH1S is a 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 highest. Compared to the FH1, the Fh1S has a bigger improved dynamic driver combined with a Knowles balanced armature driver for turly deep and revealing bass, astonishingly clear mids and highs, and truly moving lush vocals. The FH1S provides excellent comfort, it allows anybody to put on the FH1S more easily and wear it more comfortablely. It has not only a better tuning performance, also upgraded the configuration of cable, package, accessories, etc., and bring you a new earphone with high configuration and high cost performance.