The KA17 is a professional HiFi USB headphone audio adapter designed for connecting to mobile phones, tablets, and computers. With high-spec configuration, functionality, performance, and experience at HiFi level, it offers a high-quality listening experience. The latest USB dongle product, equipped with two ES9069Q DAC chips, further reduces the digital noise inside the DAC, achieving a dynamic range of 130dB and total harmonic distortion of -120dB, providing a purer sound background. The KA17 is equipped with desktop mode and dual Type-C interfaces. When powered by USB, it can operate in desktop mode with a single-end output power of up to 270mW+270mW and balanced output power of 650mW+650mW, capable of driving most headphones. You can connect your phone, tablet, or computer through the Type-C interface and enjoy high-quality music playback with the powerful decoding and driving capabilities of KA17. Adjusting the PEQ through the FIIO Control APP to personalize the sound. This allows you to correct any deficiencies in the headphone frequency response curve and smooth out any peaks and dips. Additionally, you can simulate the frequency response curves of some famous headphones.The KA17 utilizes a four-channel fully balanced THX AAA 78+ headphone amplifier architecture, featuring a new design that significantly increases the output power. The KA17 is a professional HiFi USB headphone audio adapter designed for connecting to mobile phones, tablets, and computers. With high-spec configuration, functionality, performance, and experience at HiFi level, it offers a high-quality listening experience.