Note: This is a pre-order that is expected to ship the third week of March. 

Take sound seriously

The FiiO K17 is a full- balanced desktop DAC and headphone amplifier featuring a discrete Class AB circuit, dual AKM flagship DACs, and a 4000mW+4000mW output—built for audiophiles who demand clean power, low noise, and versatile connectivity. Its robust build, intuitive touchscreen, and multiple connectivity options make it an incredibly versatile hub for your audio system. Whether you’re driving high-impedance headphones, fine-tuning your sound with a 31-band PEQ, or streaming lossless audio over Gigabit Ethernet, the K17 handles it all with precision and retro personality. 

A DAC designed for high fidelity

An AKM flagship DAC chipset—AK4191+AK4499EX*2—decodes your digital files. Each channel is handled by a dedicated AK4499EX, improving channel separation and dynamic range. The design also incorporates AKM’s "DWA ROUTING" technology, ensuring a clean background and detailed sound reproduction.

Discrete Class AB amplification

The K17 features a fully-discrete Class AB transistor current amplification headphone amplifier. Using ON Semiconductor MJE243/253 transistors, this design delivers high current with low output impedance. The result is 4000mW+4000mW of balanced output, enabling it to drive a wide range of headphones.

Analog and digital—separate power supplies for cleaner audio

By keeping the power supplies for the digital and analog circuits separate, the K17 reduces interference and crosstalk, giving you purer audio signal, free from unwanted noise or distortion.

Multi-stage analog power supply

The K17's analog circuitry benefits from a multi-stage power supply, with dedicated power control circuits for different stages of the signal path. Secondary voltage regulation with low-noise TPA7A47/7A33 LDO regulators ensures steady, clean power delivery for uncompromised audio performance.

PEQ that doesn’t compromise quality

A built-in M21586Q DSP chip enables a 31-band high-precision lossless PEQ. Unlike traditional EQ systems that can degrade audio fidelity, this PEQ preserves signal integrity while allowing you to fine-tune your sound.

Low-noise, high-stability clocking

Three ultra-low phase noise femtosecond crystal oscillators—ACCUSILICON AS318-L (45.1584MHz, 49.1520MHz) and AS318-Pro (24.576MHz)—ensure precise timing for digital audio conversion. This reduces jitter and maintains signal accuracy across various sample rates.

3.93-inch touchscreen

A large, easy-to-read touchscreen makes navigating the K17’s functions straightforward. Combined with an infrared remote, it puts control at your fingertips whether you're fine-tuning settings or switching inputs.

Wired and wireless—your choice

With both Gigabit Ethernet and 2.4G/5G Wi-Fi, the K17 offers stable, high-speed network connectivity. Stream lossless audio without dropouts or interruptions no matter how you prefer to listen.

Physically separated boards reduces interference

The K17’s internal design places the power supply, digital, and analog sections on separate circuit boards. This minimizes interference, ensuring accurate signal processing and a cleaner audio output.

Intelligent protection systems

With multiple layers of protection, the K17 ensures reliable operation and long-term durability:

• Headphone amp temperature protection

• Transformer temperature protection

• Output overload protection

• Output DC protection

• Power input overcurrent protection

Product highlights

• Discrete Class AB headphone amplifier with 4000mW+4000mW balanced output

• Flagship AKM DAC chipset (AK4191+AK4499EX*2)

• Separate analog and digital power supplies for cleaner audio

• Multi-stage power regulation with secondary voltage regulators

• 31-band high-precision lossless PEQ

• Three ultra-low phase noise femtosecond crystal oscillators

• 3.93-inch touchscreen for easy control

• Gigabit Ethernet and 2.4G/5G Wi-Fi for flexible connectivity

• Physically separated circuit boards to reduce interference

• Multiple protection mechanisms for safe operation

General Specifications

• Model: K17

• Colors: Black/Silver

• Dimensions: 244.6 x 213 x 66.8 mm

• Weight: 2750g

• Display: 3.93-inch LCD (240×1020) bezel-less screen

• Volume control: Knob / Touch-on-display / Remote control

• Firmware upgrade:

• SoC firmware: Upgrade via rear USB-A port

• MCU firmware: Upgrade via rear RS232 port

• XMOS firmware: Upgrade via front or rear USB-C port

• Touch-on-display: Supported

• Remote control: Supports IR remote (only the included accessory)

• Knob indicator light: Customizable color, brightness, and RGB pulsing

Hardware Solution

• SoC: X2000

• MCU: ESP32-S3

• DAC: AK4191EX + AK4499EQ*2

• USB decoding: XU316

• Bluetooth decoding: QCC5125

• Amplifier: MJE243G/253G discrete transistor current amplification

Working Modes

• USB DAC mode

• Coaxial decoding mode

• Optical decoding mode

• Line-in mode

• Balanced-in mode

• Bluetooth receiving mode

• Streaming media receiving mode

• Local playback mode

Audio Features

• Gain modes: Ultra high gain / Super high gain / High gain / Medium gain / Low gain

• MQA: Supports full decoding

• PEQ: Global 31-band PEQ (No PEQ processing in digital output)

Wireless & Connectivity

• Wi-Fi: Supports 2.4G/5G dual-band Wi-Fi

• Bluetooth 5.1 codecs supported:

• SBC, AAC, aptX, aptX LL, aptX HD, aptX Adaptive, LDAC

• Ethernet: Supports Gigabit speeds for fast and stable transmission

Performance & Audio Output

Headphone Output (6.35mm, USB DAC, Coaxial/Optical Decoding)

• Ultra High Gain Mode:

• Output Power:

• L+R ≥ 1800mW + 1800mW (16Ω, THD+N <1%)

• L+R ≥ 1850mW + 1850mW (32Ω, THD+N <1%)

• L+R ≥ 240mW + 240mW (300Ω, THD+N <1%)

• Noise Floor: < 5μV (A-weighted)

• THD+N: < 0.0005% (1kHz/-12dB@32Ω)

• SNR: ≥ 124dB (A-weighted)

• Peak Output Voltage: > 24Vp-p

• Crosstalk: ≥ 76dB (1kHz@32Ω)

• Output Impedance: < 1Ω (32Ω)

• Super High Gain Mode:

• Output Power:

• L+R ≥ 1800mW + 1800mW (16Ω, THD+N <1%)

• L+R ≥ 1000mW + 1000mW (32Ω, THD+N <1%)

• L+R ≥ 120mW + 120mW (300Ω, THD+N <1%)

• Noise Floor: < 5μV (A-weighted)

• SNR: ≥ 121dB (A-weighted)

• Peak Output Voltage: > 17Vp-p

Balanced Headphone Output (4.4mm/XLR4, Coaxial/Optical Decoding)

• Ultra High Gain Mode:

• Output Power:

• L+R ≥ 1800mW + 1800mW (16Ω, THD+N <1%)

• L+R ≥ 4000mW + 4000mW (32Ω, THD+N <1%)

• L+R ≥ 950mW + 950mW (300Ω, THD+N <1%)

• Noise Floor: < 7.9μV (A-weighted)

• SNR: ≥ 124dB (A-weighted)

• Peak Output Voltage: > 48Vp-p

• Crosstalk: ≥ 119dB (1kHz@32Ω)

• Output Impedance: < 1.5Ω (32Ω)

• Super High Gain Mode:

• Output Power:

• L+R ≥ 1800mW + 1800mW (16Ω, THD+N <1%)

• L+R ≥ 3900mW + 3900mW (32Ω, THD+N <1%)

• L+R ≥ 480mW + 480mW (300Ω, THD+N <1%)

• Noise Floor: < 7.9μV (A-weighted)

• SNR: ≥ 123dB (A-weighted)

• Peak Output Voltage: > 34Vp-p

Single-ended Line Output (RCA, USB DAC, Coaxial/Optical Decoding)

• THD+N: < 0.00053% (1kHz/-10dB@10kΩ)

• Crosstalk: ≥ 118dB (1kHz@10kΩ)

• SNR: ≥ 121dB (A-weighted)

• Noise Floor: < 2.2μV (A-weighted)

• Line Output Level: 2.5Vrms (1kHz@10kΩ)

Balanced Line Output (XLR3, USB DAC, Coaxial/Optical Decoding)

• THD+N: < 0.00045% (1kHz/-10dB@10kΩ)

• Crosstalk: ≥ 121dB (1kHz@10kΩ)

• SNR: ≥ 125dB (A-weighted)

• Noise Floor: < 2.6μV (A-weighted)

• Line Output Level: 5Vrms (1kHz@10kΩ)

Maximum Supported Sampling Rate

• USB Decoding: Up to 768kHz/32bit, DSD512 (Native)

• Coaxial Input Decoding: Up to 192kHz/24bit, DSD64

• Optical Input Decoding: Up to 96kHz/24bit

• Coaxial Output: Up to 192kHz/24bit, DSD64

• Optical Output: Up to 192kHz/24bit

• Streaming Decoding: Up to 384kHz/32bit, DSD256 (DOP)

• Local Playback: Up to 384kHz/32bit, DSD256

Adaptive Impedance

• PO: 8~150Ω

• BAL: 8~350Ω

What’s included

• FiiO K17 DAC & headphone amplifier

• AC power cord

• Remote control

• XLR4 plug cover

• Fuse

• USB data cables (x2)

• Headphone plug adapter

• Warranty card

• Quick start guide

Apos Promise

• Free Priority Shipping
• Price Match Guarantee
• Apos One-Year Transferable Warranty
• 45-Day Returns