FiiO K15 Desktop DAC & Headphone Amplifier

Leading the new ‘core’ generation Dual high-end AKM DAC AK4497S
The K15 is among the first to use two of the new high-end AKM DAC chips, AK4479SVQ featuring the upgraded 'VELVET SOUND' audio technology. The chips achieve low distortion, a wide dynamic range, and extended signal bandwidth, all at low power consumption. Rich detail is retained in both low and high frequencies for a natural and immersive sound experience.

Discrete architecture
Class-AB transistor current-boosting headphone amplifier circuit
Within the K15 is a carefully designed discrete headphone amplifier circuit, featuring an OP + transistor current-boosting design. A complementary pair of the classic ON Semiconductor MJE243G/253G delivers high current and low impedance output. This discrete circuit can achieve balanced output power up to 3000mW + 3000mW, allowing the K15 to effortlessly drive both full-sized headphones and in-ear monitors - producing smooth, natural, yet melodious sound.

Fully balanced audio circuit
From DAC decoding, low-pass filtering, gain control, and to headphone amplification, the K15’s audio circuit is a fully differential design. Such a design ensures wide dynamic range while also effectively reducing crosstalk, minimizing noise, and enhancing the quality of audio output.

Physically separated boards
The internal power supply, digital, and analog sections each lie on separate physical boards, physically preventing crosstalk. This effectively ensures the precision and integrity of processed audio signals, for pure and quality sound.

Precisely designed power supply
DC/AC dual power supply
The K15 features a built-in next-generation 30W (12V-2.5A) low-noise, high-efficiency, long-lasting, industrial and instrumentation-grade power supply. The K15 also supports external DC power supplies*, allowing it to work with higher-performance linear power supplies for even higher sound quality.

Separate digital and analog section power supplies
Such a design helps to effectively avoid crosstalk between the digital and analog sections of the audio circuits by ensuring better power isolation and improved anti-interference abilities.

Multi-stage analog power supply
The analog section features a precisely-segmented multi-stage power supply, including stages for digital-to-analog conversion, LPF, and transistors. The power supply utilizes up to 14 low-dropout linear regulators to ensure a continuous supply of stable and pure power.

Precisely restored signals, Every last detail heard
2 Accusilicon low phase noise femtosecond audio crystal oscillators
Inside the K15 is the industry-leading ACCUSILICON ultra-low phase noise AS318-L crystal oscillator (45.1584MHz, 49.1520MHz) that effectively reduces phase noise interference in audio signals. This ensures precise reproduction of audio signals at various sampling rates, for purer and more stable sound.

Dual master cores Stable and smooth experience
High-performance multi-core processor X2000: This processor is powered by a unique design featuring dual XBurst@2 cores + XBurst@0 micro-core, to deliver exceptional computing performance at ultra-low power consumption. This ensures precise audio signal processing, guaranteeing stable and smooth music playback.

Efficient MCU ESP32-S3: Integrated into this chip is a high-performance Xtensa 32-bit LX7 dual-core processor and an ultra-low-power coprocessor, featuring a clock speed of up to 240MHz. This chip enables precise system control for a highly efficient and fast user experience.

A harmonious fusion of square and round brilliance in design
The K15 features FIIO's signature design blending square and round elements, merging retro elegance with cutting-edge technology. Thoughtfully crafted for both functionality and aesthetics, it features convenient screen controls and multiple knobs for smoother operation. In addition, the grid structure enhances heat dissipation - all showcasing the brilliance of its meticulous design.