FiiO FD15 13.8mm Magnalium DLC HiFi Dynamic Driver in-Ear Earphone with Stainless Steel Shell, Detachable MMCX Cable (Black)

FD15 has made a breakthrough in audio technology. It has FiiO’s latest acoustic patent F.T.B.S “Tesla Valve” low-frequency loading technology. Coupled with its premium manufacturing quality and exquisite craftsmanship, FD15 sets a new standard for sound reproduction. FD15 is the ideal choice for audiophiles who pursue unparalleled audio performance. It promises to provide an immersive listening experience that exceeds expectations.

The FD15 introduces a truly high-end headphone-grade metal diaphragm—magnesium-aluminum alloy dome with DLC suspension. This innovative combination of materials enhances the listening experience profoundly: not only does the FD15 faithfully reproduce the spacious and soft essence of “circle taste,” but it also achieves significant advancements in high-frequency extension and resolution. As a result, the overall sound is characterized by its bright transparency and refined delicacy.

The FD15 is equipped with the F.T.B.S “Tesla Valve” low-frequency loading acoustic patent technology. Leveraging advanced powder metallurgy, the FD15 achieves precise calculations of branch length, angle, and quantity in the earcup cavity. This engineering results in a fluidic structure that matches the acoustic design of the Tesla Valve, significantly enhancing the headphone’s capability to reproduce deep, resonant low frequencies. Experience a profound and immersive bass response that truly captivates.

The all-new FD15 comes standard with a cable crafted from Furukawa single crystal copper and Furukawa single crystal copper plated with silver.The cable’s raw materials are sourced from authentic Furukawa imports from Japan, featuring a cross-sectional area as large as 22AWG, it rivals the quality of high-end HiFi headphone cables typically found in thousand-dollar ranges, making luxury affordable and accessible.

The FD15 boldly adopts Hi-End level audio design principles by incorporating a W-shaped independent suspension design in its headphones. Compared to conventional diaphragm designs of the same size, this innovation increases the effective vibrating area by 30%. The larger effective diaphragm area and greater amplitude enable the acoustic core unit to store more sound energy, delivering a more dense and grounded auditory experience for listeners.