FiiO FA19 10 Balanced Armature in Ear Monitors | Audiophile Earphones with Detachable Pure Silver MMCX Headphone Cable Note: A signature is required for package delivery. 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. The customized low-frequency enhanced balanced iron unit improves the airflow throughput of the low-frequency balanced iron unit, thereby increasing the vibration amplitude and enhancing the comprehensive energy of each low-frequency balanced iron unit, providing you with powerful low-frequency sound effects。 In order to more accurately divide the multiple moving iron units, FA19 uses ruby audiophile-grade film crossover capacitors imported from Japan as crossover electronic components. The accuracy error of FA19 is as low as 0.1%. In addition, compared with ordinary ceramic capacitor components, FA19 not only obtains more accurate crossover points, but also effectively improves high-frequency resolution and sound quality. “Monitor/HiFi” mode switch: “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. 8-strand 224 wires pure silver cable: The FA19 comes standard with a high-purity pure silver cable, consisting of 8 strands of 28 wires each for a total of 224 wires. 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.