FA19 utilizes a ten-unit balanced armature acoustic architecture, delivering frequency response and a high level of clarity and transparency. In collaboration with the acoustic team at Knowles, a specialized low-frequency enhanced balanced armature driver has been custom-designed for FA19, providing rare and powerful low-frequency performance. In order to more accurately divide the multiple moving iron units, FA19 uses ruby audiophile-grade film crossover capacitors imported from Japan . The accuracy error of FA19 is as low as 0.1% . “Monitor” mode, delivers clean detailed sound, especially in the treble, making the FA19 an excellent tool for audio production. “HiFi” mode, which adds energy to the mids and bass, with special attention to the bass to give it more impact and quantity. It is the ideal way to experience pleasant HiFi sound. The headphone cable is made of high-purity pure silver with high conductivity that not only allows for gobs of detail to come through, but also provides an enjoyable, vivid sound.