High-performance dual cores for soul-shaking sound Two ES9068AS DACs handle the left and right channels and make up the high-quality "core" of the K9. Listen to your favourite playlist and be instantly immersed in the music. High-end amplifier - Refreshingly capable The FiiO K9's ace up its sleeve is the THX AAA 788+ amplifier, giving it an extraordinary 1% undistorted power output up to 780mW at 3000 and up to 2000mW at 320. No matter if you use low-impedance or high-impedance headphones, the K9, will drive it with aplomb. Partitioned design for max performance of each section The PCB of the K9 features a partitioned layout, fully separating the major sections of the audio circuit - the power supply, signals, and analogue signal loop. This guarantees the integrity of the audio signal being processed. Six-stage audio circuit faithfully reproducing sound The desktop-grade six-stage audio circuit was meticulously designed to ensure a pure, delicate yet rich sound. (IV conversion), LPF filter, digital volume adjustment, buffer amplifier, pre-amplifier, and post-stage drive. Multiple LDOs in multiple stages, truly stable power The power stabilization and filtering within the audio circuit play a big part in ensuring excellent sound quality. Each stage of the audio circuit employs ultra-low-noise LDOs for voltage regulation. Isolated digital and analogue section power supply, for purer sound The digital and analogue portions of the K9 receive power separately to reduce interference between the two audio circuits, for pure and faithful reproduction of your music. Electricity is the Robust power supply, ample power The linear transformer is paired with 4 massive 4700uF capacitors to provide clean continuous power Dual-mode clock management, even more improvement to the sound Accurate and stable dual-mode clock management allows the K9 to easily play back high-resolution audio with the greatest fidelity as if you were there with the performing artists. Compatible with UAC 1.0 / UAC2.0 - highly adaptable The K9 supports both UAC1.0 and UAC2.0 modes, allowing you to use the K9 with either device that is simply plug-and-play or with devices that can work with the K9 with an additional driver for even better compatibility. And the FiiO Control App allows you to easily switch between UAC1.0 and UAC2.0 modes. *UAC1.0 for PS5 and other device support. High-res Bluetooth for all of your audio-visual needs The K9 employs the QCC5124 Bluetooth chip with support for LDAC/aptX Adaptive/aptX/aptX HD aptX LL/AAC/SBC high-res Bluetooth formats. With the K9, you can listen to music, watch videos, and play video games with high quality and low latency. Additional Bluetooth functionalities You can connect the K9 to your phone via Bluetooth, and with the addition of the FiiO Control app you get access to even more functionalities. Adjust various settings such as filters, status indicators, EQ and channel balance to exactly your liking. There are 7 preset running styles and if you want more options there is a self-define PEQ (Parametric Equalizer) design that will help you to fine-tune to your favourite listening style.