FiiO K15 B - Desktop DAC and Headphone Amplifier BLACK

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The FiiO K15 is a desktop DAC and headphone amplifier designed to deliver high-end audio performance, ideal for the most discerning audiophiles and those seeking superior sound quality in their home or studio environments. At the heart of the system are two AKM AK4497 DACs, high-end chips known for their excellent accuracy and natural, detailed sound. Amplification is handled by a discrete Class AB circuit with current-boosting transistors, capable of driving high-impedance headphones effortlessly, thanks to an output power exceeding 3000mW per channel.

Precise digital-to-analog signal conversion is further ensured by two ultra-low phase-noise femtosecond quartz oscillators, which significantly reduce jitter and ensure faithful, distortion-free reproduction. The entire audio circuit is fully balanced, optimized to reduce interference and crosstalk, and to deliver a clean sound rich in dynamics and depth.

The K15 integrates advanced media streaming and local playback features, perfectly suited to the needs of the modern user. The front panel features a large 3.93-inch touchscreen that allows for intuitive and instant control of all functions, while network connectivity is ensured by dual-band Wi-Fi support (2.4G/5G) and a Gigabit Ethernet port, for a stable and seamless user experience.

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Next-generation dual AKM DACs: high-fidelity audio with VELVET SOUND technology

The FiiO K15 is one of the first devices to integrate two high-end AKM AK4497S DACs, featuring the new VELVET SOUND technology. These chips ensure ultra-low distortion, wide dynamic range, and extended bandwidth, all with low power consumption. The result is audio reproduction rich in detail at both low and high frequencies, for a natural and immersive listening experience. VELVET SOUND technology embodies AKM's sonic philosophy: true-to-life, authentic, and immersive sound, without compromise.

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Power and Musicality

The heart of the K15 is a Class AB headphone amplifier circuit designed with discrete architecture. Thanks to the OP configuration + enhancement transistors (ON Semiconductor MJE243G/253G), the K15 delivers a balanced output of up to 3000mW + 3000mW, with high current and low impedance. Perfect for driving both over-ear headphones and in-ear monitors, it guarantees smooth, natural, and musical sound.

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Separate Board Design: Total Signal Isolation

The K15 uses an internal architecture with physically separate boards for the power supply, digital section, and analog section. This physical isolation minimizes crosstalk, ensuring maximum purity and precision in audio signal reproduction.

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Precision Power Supply: Stability and High Performance

The FiiO K15 features a 30W (12V - 2.5A) internal low-noise power supply, designed to industry and instrumentation standards. It also supports external DC power supplies* for those who want to maximize audio quality using high-performance linear power supplies.

*Compatible with external 12V-2.5A DC power supplies

• Wide input range: 85~305VAC

• Operating temperature: -40°C ~ 85°C

• High reliability: up to 500,000 hours of operation

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Accusilicon femtosecond oscillators: Absolute precision in the details

For ultra-high-fidelity audio reproduction, the K15 integrates two Accusilicon AS318-L low-phase-noise oscillators (45.1584 MHz and 49.1520 MHz). These professional-grade components effectively reduce jitter interference and ensure extremely accurate reproduction of audio signals, at any sampling rate.

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2 Nichicon 3300uF audio capacitors + 4 ELNA MILIC II capacitors + 8 ELNA RA3 capacitors

Improved sound quality, with greater depth and definition of the soundstage.

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8 ruby ​​film capacitors + 32 wafer resistors

Ensures sound stability even under extreme conditions, thanks to low temperature drift and low noise.

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High-performance Beryl capacitors

Ultra-low ESR and excellent anti-interference capability, for clean and stable power supply.

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Silver-plated oxygen-free copper interconnects

Internal connections made of high-quality materials for high-fidelity signal transmission with minimal loss.

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Dual master processor: smooth and stable performance

The K15 integrates a dual-core architecture for advanced and responsive audio management.

• High-performance X2000 processor. Equipped with a dual XBurst@2 core + XBurst@0 micro-core, it delivers high processing power with minimal power consumption. Perfect for precise audio signal processing and smooth music playback.

• ESP32-S3 MCU. With a Xtensa 32-bit LX7 dual-core processor running at up to 240 MHz and an integrated ultra-low-power coprocessor, it ensures efficient system control and a fast, responsive user experience.

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10-band PEQ equalizer: personalized sound

All of the K15's digital inputs support PEQ* (Parametric Equalizer) adjustment. Thanks to FIIO's proprietary algorithm, you can precisely adjust the frequency response curve of your headphones to tailor the sound to your taste.

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Multiple protection systems: listen with peace of mind

The K15 features an intelligent safety architecture, with protection systems that can automatically detect abnormal conditions to prevent damage to the device and ensure safe use over time.

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Stable connections, wired or wireless

Whether you prefer a wired or wireless connection, the FiiO K15 ensures reliable, high-resolution audio transmission.

Dedicated Gigabit Ethernet port for fast and stable wired connections

AP6256 Wi-Fi module compatible with 2.4G and 5G networks for smooth and uninterrupted wireless streaming

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Maximum Versatility

The FiiO K15 adapts to numerous audio scenarios thanks to its wide range of features:

• USB decoding

• Streaming playback (Roon and AirPlay compatible)

• Local storage playback

• Optical/coaxial decoding

• Unbalanced and balanced line input

• Bluetooth decoding

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Panel Descriptions

• Infrared reception port
• Display
• Menu knob with button
• Knob indicator
• Volume knob with button
• Power indicator
• Power switch
• Analog output selector
• Gain selector
• USB port*
• 6.35 mm headphone output
• 4.4 mm balanced headphone output
• Balanced headphone output XLR4
• WiFi antenna
• Optical input
• Coaxial input
• Reset port
• RS232 port
• USB port
• USB-A port*
• Ethernet (LAN) port
• Ground terminal
• Balanced line input
• Single-ended line input
• Single-ended line output
• Balanced line output
• DC/AC power selector switch
• DC power input
• AC power switch
• AC power input

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Package Contents

• K15 Black x 1
• AC Power Cord x 1
• Remote Control x 1
• XLR4 Decorative Plug x 1
• Fuse x 1
• USB Data Cable x 2
• Headphone Adapter x 1
• Warranty Card x 1
• Quick Start Guide x 1