Hi-Res Audio Certification

The F9 PRO has been certified by the Japan Audio Society to be "Hi-Res Audio" capable. This means that the F9 PRO is capable of a frequency response up to 40kHz, which can fully reproduce the audio and give you a natural and life-like listening experience that truly lets you listen to the music the way the artists wanted it to sound.

The F9 PRO's outer aluminum shell is meticulously crafted using CNC systems – impressive already, but it doesn't stop there. The shells are then carefully hand-polished and matched, before going through sandblasting and anodization. This complex overall process ensures that the F9 PRO has a masculine, robust shell that is yet encapsulated in a tender beauty.

Precision Craftsmanship

The F9 PRO utilizes the standard MMCX connector for its interchangeable cables, and comes standard with both 2.5mm balanced and 3.5mm single-ended cables.

Freely switch between balanced and single-ended with standard MMCX connectors

The F9 PRO utilizes a dynamic driver made of PEK (polyether ketone) polymer nanocomposite, known for not only being tough but also being light. This allows the F9 PRO's dynamic driver to be highly capable of producing quick, detailed, and extended bass.   

PEK polymer nanocomposite driver for heightened detail

1 Dynamic Driver & 2 Balanced Armatures for Triple helpings of rich sound 

The F9 PRO utilizes a hybrid design in which each channel is composed of one dynamic and two balanced armature (BA) drivers. The 9.2mm dynamic driver is specifically tuned to produce bottomless lows while the two BA drivers utilizing the American brand knowles' 30017, which precisely portray extended upper-mids and highs.

Meticulous Attention to detail in an exclusive experience

We conduct dozens of stringent quality tests, thousands of times, so that you may cast your worries away and your fears are allayed.

Thoroughly Tested Before Being Delivered to You

Besides the 2.5mm balanced and 3.5mm single-ended cables, the F9 PRO comes  with a whole host of other accessories all designed to tailor and safeguard your  listening experience. For instance, the F9 PRO comes with three different kinds of silicone ear tips, each designed for a particular sound signature and coming in small, medium, and large sizes. Also included with the F9 PRO are three pairs of foam eartips, all in the same one-fits-all size.The color of the ear tips is even matched to the color of your F9 PRO unit! We give you control over your listening experience, so you can listen however you want, whenever you want. The F9 PRO also comes with our popular waterproof carrying case, as well as a water-resistant neoprene carrying pouch, so you can be rest assured that your earphones will continue to function for years to come.

Unexpectedly Thoughtful Accessories