FiiO K15 - Black - Silver

Description

Fully Balanced Desktop DAC/Headphone Amplifier
The FiiO K15 pushes the boundaries of desktop HiFi by incorporating a fully differential audio circuit, dual next-generation AKM AK4497S DACs (VELVET SOUND), and a discrete Class AB transistor headphone amplifier stage capable of up to 3000 mW + 3000 mW balanced output. Built with premium-grade components, an industrial-grade 30W power supply, and advanced control options (touchscreen, knob, remote, and FiiO Control App), the K15 is designed to be a versatile, powerful, and future-proof HiFi centerpiece.

Fully Differential Design with Next-Gen AKM DACs
The K15 employs a fully balanced differential architecture from DAC decoding to amplification, reducing noise, crosstalk, and unwanted harmonic distortion while extending dynamic range. At its core are dual AKM AK4497S DACs, among the first to feature the new VELVET SOUND technology, offering ultra-low distortion, wide signal bandwidth, and natural tonal accuracy. This ensures lifelike detail reproduction across both low and high frequencies, delivering immersive, true-to-life sound.

Discrete Class AB High-Power Amplification
The K15 uses an OP + transistor design with On-Semiconductor MJE243G/253G devices for high current delivery and ultra-low output impedance. With up to 3000 mW + 3000 mW balanced output, the amplifier easily drives full-size high-impedance headphones as well as sensitive in-ears, producing smooth, natural, and highly musical playback.

Industrial-Grade Power Design with Physical Separation
The K15 integrates a 30W industrial-grade internal power supply (12V-2.5A), low-noise and long-lasting, which can also be replaced by an external DC power supply for even higher performance. The power, digital, and analog sections are placed on physically separate boards, avoiding interference while preserving precision and signal integrity. Its multi-rail analog power stage with 14 LDOs ensures ultra-clean, stable current delivery for DAC, filters, and amplifier stages.

Accusilicon Oscillators and Premium Components
The K15 includes dual Accusilicon ultra-low-jitter crystal oscillators (45.1584 and 49.1520 MHz) for optimized sampling accuracy and minimized phase noise. It also employs Nichicon and ELNA audio capacitors, ruby film capacitors, precision resistors, and silver-plated oxygen-free copper internal wiring, ensuring wide soundstage, refined timbre, and stability under all conditions. Beryl solid capacitors provide ultra-low ESR and high anti-interference capability for further purity.

Dual-Processor Platform for Performance and Control
The K15 runs on a multi-core X2000 processor (dual XBurst@2 + micro-core), ensuring powerful signal processing at low power consumption, paired with an ESP32-S3 dual-core processor (240 MHz) for efficient system management. Together, they guarantee stable playback, intuitive navigation, and responsive user control.

Elegant Design and Smart User Control
Blending square and curved elements, the K15 combines retro elegance with modern refinement. Its chassis incorporates a structured grid for efficient heat dissipation, enhanced usability with touch operation, knob control, bundled remote, and full app integration via FiiO Control.
The RGB logo lighting and 10-band precision parametric EQ (PEQ) allow personalization of both listening and visual aesthetics.

Advanced Connectivity and Protection
Supporting USB, coaxial, optical, Bluetooth, Ethernet, streaming, and local playback, the K15 adapts to versatile usage scenarios. The Gigabit Ethernet port and dual-band Wi-Fi (2.4G/5G) guarantee stable network playback, while advanced safety systems (DC protection, overload, overheating, anti-pop) ensure reliability.

What’s in the box
FiiO K15 unit
AC power cord
Remote control
Decorative XLR4 plug
Fuse
2× USB data cables
Headphone adapter