16-core XMOS XU316
10-level highly precise PEQ
THX AAA 78+
SABRE
MQA

FiiO KA17
Portable DAC & Headphone Amplifier


Machine Mode 650mW 650mW Strong Thrust
Dual Channel Flagship DAC ES9069Q*2

Ten-segment high-precision PEQ adjustment
Professional grade XMOS 16 core XU316

Four-way fully balanced THX AAA 78 amp
Multi-level HiFi audio architecture
Anti-crosstalk design of digital-analog split board

3-level 10-channel precision power supply design
Humanized dot matrix screen interactive system
Independent Type-C power supply interface

Desktop mode
Taking it to the next level

The desktop mode has been continually refined with the release of various products, such as the portable yet desktop-grade M17, Q7, M15S, Q15 and KA13. And now the perfected desktop mode has found its way to the KA17.

The FIIO KA17 features a special desktop mode, activated using the dedicated D.Mode switch. Enable the desktop mode, and the KA17 will automatically adjust the DAC, amplifier power supply, and the amplifier power output to fully unleash their potential with greater power output.

Parallel output Big boost in power

With sufficient USB power supply input and desktop mode enabled, the KA17’s four THX headphone amps work together in parallel for greater current and overall power output. The result is up to 270mW+270mW power output for single-ended out, and up to 650mW+650mW power output for balanced out.

Dual flagship ES9069Q DACs
Two cores power four ways
Excellent performance

The KA17 employs two of the new ESS ES9069Q flagship DACs, powered by fourth-gen 32bit HyperStream technology. These chips feature even higher performance, lower power consumption, and less digital noise than previous generations for an absolutely pristine and pure audio background.

DNR: 130dB    THD+N: -120dB

Ten-level highly precise PEQ

XMOS XU316 chip allowed FIIO engineers to develop a highly precise adjustable PEQ*, with 10 customizable frequency bands. FIIO’s self-developed PEQ algorithm and interface allow you to fine-tune the frequency, gain, and bandwidth of each PEQ band, letting you dial in the sound to exactly the way you want it. 

*PEQ adjustment is supported in formats up to PCM 192kHz/24bit.
*PEQ is currently not supported in UAC1.0 mode.

Outstanding performance
Audiophile-grade 16-core XMOS XU316

Handling USB duties in the KA17 is the 16-core XMOS XU316, rarely found in audio dongles. This chip features lower latency, more stable signal transmission, and better compatibility than typically used USB control chip. And when paired with dual crystal oscillators, the KA17 is more than capable of handling various digital audio sources with various sampling rates.

*Compatible with Android, iOS, Windows, Mac.

All-new THX AAA 78+ headphone amp
Compact and elegant, Yet boasting pure and refined sound

The THX AAA 78 headphone amp proved itself in the mid-to-high-end M11 Pro and M11 Plus players. Now, the even newer and upgraded THX AA 78+ features in the KA17.

Inside the KA17 are THX AAA 78+ headphone amplifiers, with 8 op amps working in parallel in a 4-channel fully balanced configuration, allowing for not only greater power output, but also more detailed and realistic sound.

Comparable to DAPs
Multistage HiFi audio circuit

FIIO engineers were cleverly able to adapt the audio circuit designs of mid to high-end digital audio players to the compact KA17. With its high-precision handling of digital audio signals thanks to the dual crystal oscillator clocks and high-performance DAC converted to analog signals output by a robust analog section consisting of LPF voltage amplification, BUF current expansion and headphone amps working together in parallel, you can be sure that the KA17 can reproduce the detail and dynamics in your music as well as a serious digital audio player.

*FiiO Control app’s control over KA13 only supported on Android devices.

Follow the logic of Yin & Yang
Separate digital and analog boards

The digital and analog portions of the audio circuit lie on totally separate circuit boards in the KA17, each board equipped with a shielding cover for total isolation. This ensures that the digital and analog portions of the audio circuit do not interfere with each other, enabling accurate processing of audio signals. 

3-stage 10-rail power supply design | Compact size outside, Grand design inside

Inside the KA17 is a 3-stage 3-main rails power supply design. The three main stages of the power supply consist of a first stage filtering + overvoltage protection, second stage DC-DC boost conversion, and a third stage LDO voltage stabilization. This filtering of electricity applies to each of the three main power supply rails, one each for the digital, digital-to-analog conversion, and analog signal parts of the audio circuit. To top it all off, the power supply circuit is divided into ten smaller rails. The power supply found in the KA17 features many of the same principles as those found in desktop headphone amplifiers, ensuring a robust foundation for the KA17’s excellent sound.

Unified Screen
Intuitive dot-matrix display control

The KA17 employs a 0.91-inch dot matrix display that can indicate different functions intuitively. Also, coupling with the physical buttons easily allows you to customize various settings such as screen orientation, filters and display sleep timer.

Independent Type-C power supply

The KA17 features two USB Type-C ports. One is the typical port used to connect to other devices such as phones, tablets and computers. The orange port on the side is designed for use with an external power supply. When an external power supply is connected to this port, the KA17 can achieve higher power output and better performance without consuming the battery of your phone or other connected device.

For worry-free listening
Multiple protection systems

Built into the KA17 are temperature and DC output monitoring systems that ensure both the unit itself and connected headphones won’t be damaged under abnormal conditions. You can also set a maximum volume level to prevent accidental hearing damage to your ears from excessively loud audio.

Two distinct colors with a matching leather case

KA17 is available in either black or blue. Each version comes with a color-matched leather case that protects the device with style.

Every last detail considered, All to enhance your experience

Driver-free mode
UAC1.0 mode available, simply plug and play

2 volume adjustment curves

High and low gain volume curves, ensuring a better experience with headphones of various impedances

2 sets of volume adjustment steps

60-step and 120-step volume adjustment available, for finer tuning or faster tuning

Supports Android FIIO Control APP

Adjustable PEQ and other functionality

SPDIF output, transforming into a digital jukebox

The 3.5mm headphone jack also supports SPDIF output, letting you connect to external high-end DACs for even more flexibility and greater sound quality.
*SPDIF out supports 96kHz/32bit
*SPDIF output supports 96kHz/32bit sample rate



General Specifications
Name/Model KA17 Hardware solutions DAC: ES9069Q*2, USB decoding: XMOS  XU316*1
Color Black/Blue Volume control Physical buttons
Weight About 33.5g Dimensions About 64×27.7×12.7mm
Driver-free mode (switch mode) Supported Desktop mode Supported
MQA Supported MQA full decoding Channel balance ＜0.2dB
Gain level L/H Status display On the display: Transfer format, volume level, gain level, USB mode, sampling rate, etc.
Display 0.91-inch OLED display Firmware upgrade Supports upgrade through USB
Max supported sampling rate PCM: Supported up to 768kHz/32bit Recommended impedance PO: 8~150Ω
DSD: Supported up to DSD512 (Native), DOP256 BAL: 8~300Ω
SPDIF: Supported up to 96kHz/24bit
Buttons and Ports
Buttons Multifunction button*1; Volume up/down*1 USB Type-C USB2.0 (power supply/data transfer)/USB Type-C POWER IN (orange, powering)
Headphone output Standard 3.5mm port (PO/coaxial out shared) BAL output Standard 4.4mm port
Toggle switch Desktop mode switch*1
Power Supply Parameters
Power supply DC 5V  ≥1A
Audio Parameters
Parts of performance and parameters of headphone output (3.5mm, UAC decoding, Desktop mode: High Gain)
Output power L+R≥320mW+320mW (16Ω, THD+N＜1%) Output impedance ＜1Ω
L+R≥270mW+270mW (32Ω, THD+N＜1%) Crosstalk ≥75dB
L+R≥30mW +30mW (300Ω, THD+N＜1%) Output amplitude 3Vrms
THD+N & Noise ＜0.0015% (1kHz/-15dB@32Ω) SNR ≥123dB (A-weighted)
Frequency response 20Hz~50kHz: damping＜0.5dB Noise floor ＜2.1uV (A-weighted)
20Hz~20KHz: damping＜0.1dB
Parts of performance and parameters of BAL headphone output (4.4mm, UAC decoding, Desktop mode: High Gain)
Output power L+R≥460mW+460mW (16Ω, THD+N＜1%) Output impedance ＜1.5Ω
L+R≥650mW+650mW (32Ω, THD+N＜1%) Crosstalk ≥114dB
L+R≥90mW+90mW (300Ω, THD+N＜1%) Output amplitude 4.5Vrms
THD+N & Noise ＜0.0004% (1kHz/-8dB@32Ω) SNR ≥126dB (A-weighted)
Frequency response 20Hz~50kHz: damping＜0.5dB Noise floor ＜2.2uV (A-weighted)
20Hz~20KHz: damping＜0.1dB
Parts of performance and parameters of headphone output (3.5mm, UAC decoding, Non-Desktop mode: High Gain)
Output power L+R≥110mW+110mW (16Ω, THD+N＜1%) Output impedance ＜1Ω
L+R≥140mW+140mW (32Ω, THD+N＜1%) Crosstalk ≥80dB
L+R≥20mW +20mW (300Ω, THD+N＜1%) Output amplitude 2Vrms
THD+N & Noise ＜0.0015% (1kHz/-10dB@32Ω) SNR ≥120dB (A-weighted)
Frequency response 20Hz~50kHz: damping＜0.5dB Noise floor ＜2.0uV (A-weighted)
20Hz~20KHz: damping＜0.1dB
Parts of performance and parameters of BAL headphone output (4.4mm out, UAC decoding, Non-Desktop mode: High Gain)
Output power L+R≥150mW+150mW (16Ω, THD+N＜1%) Output impedance ＜1.5Ω
L+R≥300mW+300mW (32Ω, THD+N＜1%) Crosstalk ≥110dB
L+R≥30mW+30mW (300Ω, THD+N＜1%) Output amplitude 3Vrms
THD+N & Noise ＜0.0005% (1kHz/-3.5dB@32Ω) SNR ≥120dB (A-weighted)
Frequency response 20Hz~50kHz: damping＜0.5dB Noise floor ＜2.2uV (A-weighted)
20Hz~20KHz: damping＜0.1dB

KA17 performance Curve testings

Frequency response curve 1

Frequency response curve 1


Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz, High-performance high gain, 3.5mm headphone out (32Ω load)

Frequency response curve 2

Frequency response curve 2


Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz, Low-performance high gain, 3.5mm headphone out (32Ω load)

Frequency response curve 3

Frequency response curve 3


Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz, High-performance high gain, 4.4mm BAL headphone out (32Ω load)

Frequency response curve 4

Frequency response curve 4

Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz, Low-performance high gain, 4.4mm BAL headphone out (32Ω load)

THD+N curve 1

THD+N curve 1

Test conditions: USB DAC, -15dB sinusoidal signal, 20Hz-20kHz, High-performance high gain, 3.5mm headphone out (32Ω load)

THD+N curve 2

THD+N curve 2

Test conditions: USB DAC, -8dB sinusoidal signal, 20Hz-20kHz, High-performance high gain, 4.4mm BAL headphone out (32Ω load)


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