- The 6 Knowles BA drivers per ear, together with the carefully-designed 4-way crossover and low-frequency ultra-long sound tube, completely covers the entire audible frequency range with a sound that will take your breath away.
- FiiO and Knowles collaborated to come up with the custom EJ-33877 driver for use in the FA9 for excellent mid-frequency performance with hauntingly realistic vocals.
- The FA9 employs a specially-designed, ultra-long sound tube 80.6mm in length.
- The sound tube also ensures the mid-bass is smooth and clean while enhances bass texture in general.
- The FA9’s use of electronic crossover technology allows you to tune the sound to exactly the way you want with 3 sound adjustment switches.
- Detachable MMCX design including a 3.5mm-terminated cable made of 8-strand monocrystalline silver-plated copper cable gives better audio transmission performance under the naturally-occurring yet adverse skin effect.
The FA9 marks the first time FiiO has employed Knowles EJ balanced armature drivers, commonly used among high-end IEMs. FiiO and Knowles collaborated to come up with the custom EJ-33877 driver for use in the FA9 for excellent mid-frequency performance with hauntingly realistic vocals.
The sound tube acts as a low-pass filter that effectively filters out unneeded extra mids and highs from the drivers to ensure a seamless frequency response. The sound tube also ensures the mid-bass is smooth and clean while enhances bass texture in general.
Higher/ultra-high frequencies: handled by the SWFK-31376 driver that blends extreme resolution with rich sound.
The four-way crossover design has been applied so that each driver works perfectly in harmony with each other for seamlessly coherent low, middle, high, and ultra-high frequencies. With dynamic bass, crystal clear yet lush vocals, and extremely detailed yet pleasant treble, the FA9 will get you excited about your music again.
The included 8-strand monocrystalline silver-plated copper cable gives you excellent sound quality out of the box, so you don’t have to worry about upgrading to a better cable.
The FA9 is certified by the Japan Audio Society to be capable of bringing you “Hi-Res Audio” with quality far beyond those of CDs.