FiiO FD5 Dynamic IEMs

Beryllium-coated surround + DLC diaphragm

We have conducted much research and experimentation when choosing the materials for our new dynamic driver. By combining the use of Beryllium and diamond-like carbon (DLC), we make full use of the physical rigidity and flexibility properties of the materials to reduce unneeded vibration and appropriately damp sound for improved quality. Overall, the frequency response is balanced and distortion is minimized at all frequency ranges.

High-end audio inspired acoustic prism

In order to address the issues that come with the time delay between different sound waves, an acoustic prism system was specifically developed for the FD5. This was inspired by similar technology used for adjusting tweeters in well-known high-end audio products.

Anti-standing wave and semi-open design

A “volcanic field” was added to the rear of the FD5 in order to reduce low-frequency standing waves, reduce distortion, and overall improve the diffusion of bass waves throughout the FD5. The FD5 also adopts a semi-open design, which relieves air pressure on the ear – leading to more comfortable and long listening sessions.

A sound you actually want

Compared with a multiple-driver IEM, in the FD5 there is only one point from which the sound is produced from a single driver – making for more accurate sound positioning. The dynamic driver was carefully tuned in acoustics to make the FD5 sound wonderfully pleasant to most people’s preferences – a relaxed, natural

Curves of natural beauty

FiiO’s third generation design is based on carefully-designed curves, evoking majestic mountains and wonderous waterfalls. These curves combined with a faceplate offering two distinctly different textures form a sort of “acoustic art” that needs to be experienced in person.

Casting a strong voice with stainless steel

The smooth, luxurious-feeling 3D embossed stainless steel faceplate represents both form and function – while looking striking, the robust stainless steel also reduces the harmonic distortion of sound inside the FD5. The faceplate provides a striking contrast against the chrome finish of the rest of the FD5 as well.