Note: When you click the links below to download the firmware, it indicates that you have already read and agreed to the Open source licenses.

How to upgrade the firmware for K17: Click here

Solution for K17 OTA upgrade failure: Click here

Updated at 2025-09-29

Main controller firmware V231 download link: Click here

MCU firmware V92 download link: Click here

The following changes and improvements have been made to the new firmware:1.Added 2 new theme UIs;

2.Added work modes switching support for the FiiO Control App;

3.Added independent volume memory for each output modes；

4.Fixed the issue where some routers’ 5G WiFi networks were undetectable;

5.Fixed the issue where the DSP client would freeze or become unresponsive when switching EQ to Off;

6.Fixed the issue where the knob indicator light occasionally failed to turn on/off;

7.Fixed the issue where the first volume adjustment after powering on caused a brief audio stutter during playback.

1.新增冰川银，湖光青两款主题

2.新增FiiO Control APP工作模式切换功能

3.新增切换不同输出模式时，独立记忆相应音量功能

4.修复部分路由器搜索不到5G WiFi问题

5.修复DSP客户端上EQ切换到关闭时出现DSP客户端卡住不响应问题

6.修复旋钮指示灯有时候不能正常关闭或打开问题

7.修复开机后播放，第一次调节音量时声音会出现一下卡顿问题

Updated at 2025-07-18

Main controller firmware V222 download link: Click here

MCU firmware V91 download link: Click here

The following changes and improvements have been made to the new firmware:

1.Added VU meter display in all modes;

2.Added 3 new theme UIs;

3.Added the function to query firmware update history;

4.Added 'Follow theme' option for knob indicator light;

5.Fixed the the system reboot issue caused by Roon Radio playback in streaming mode;

6.Fixed the connection failure issue when the WiFi hotspot name contains  ' or + characters.

Notes:

a. Analog input requires EQ to be enabled for VU meter display support.

b. Firmware update history: You can set from Settings > Others > FW Update > Update History.

c. Knob indicator light: You can set from Settings-RGB Lights-Light color.

d. The main controller firmware V222 can be upgraded directly via OTA, while MCU firmware V91 requires downloading the firmware from the official website and upgrading via a computer.

1.新增全模式下VU表显示

2.新增3套主题UI

3.新增固件更新历史查询功能

4.新增旋钮指示灯颜色跟随主题显示功能

5.修复流媒体模式下Roon Radio播放导致系统重启问题

6.修复WiFi热点名称带'或+符号时连接失败问题

注：

a.模拟输入需要打开EQ才可以支持VU表显示

b.固件更新历史：可在设置-其他设置-固件升级-更新历史 中查看

c.旋钮指示灯：可在设置-旋钮指示灯-颜色中查看

d.主控固件V222可以直接联网OTA升级，单片机固件V91需要在官网下载固件后在电脑上进行升级

Updated at 2025-05-23

Main controller firmware V199 download link: Click here

MCU firmware V88 download link: Click here

The following changes and improvements have been made to the new firmware:

1. Fixed the issue where there a probability of output noise issue after playing in local playback or streaming mode for long time;

2. Optimized other performance.

Updated at 2025-04-12

Main controller firmware V193 download link: Click here

The following changes and improvements have been made to the new firmware:

1. Achieved Roon Ready certification

2. Fixed the issue where data corruption may occur to USB drives after K17 rebooting

3. Fixed the issue where playback may auto-stop after long-term use of USB drives

4. Fixed the issue where FiiO Link failed to search for the K17 after reboot in streaming mode

5. Fixed the issue of synchronization error between "My Favorites" and the local library in the FiiO Link APP

6. Miscellaneous UI optimizations and bug fixes

1.通过Roon Ready认证

2.修复个别U盘在关机重启后会出现数据损坏问题

3.修复长时间使用U盘播放后，小概率出现播放自动停止问题

4.修复流媒体模式下，关机重启后FiiO Link搜索不到K17问题

5.修复FiiO Link APP上，我的最爱与本机同步刷新异常问题

6.其他UI调整与bug修复

Updated at 2025-04-01

Main controller firmware V183 download link: Click here

MCU firmware V87 download link: Click here

The following changes and improvements have been made to the new firmwares:

1. Added Link control in FiiO Control APP (Mobile phone and K17 can be controlled via APP for playback and EQ adjustment when connected to the same WiFi network).

2. Added OTA online upgrade function for SoC (will take effect in subsequent firmware versions).

3. Fixed the rare bricking issue during USB drive upgrades.

4. Fixed MCU firmware upgrade abnormality of MAC system (will take effect in subsequent firmware versions).

5. Miscellaneous bug fixes.

1.新增FiiO Control APP Link操控功能

（手机与K17连接同个WiFi后可通过APP操控播放和EQ调节）

2.新增主控OTA在线升级功能（后续版本固件生效）

3.修复U盘升级小概率出现变砖问题

4.修复MAC系统单片机固件升级异常的问题（后续版本固件生效）

5.其他bug修复

Updated at 2025-02-27

Main controller firmware V146 download link: Click here

MCU firmware V80 download link: Click here

The following changes and improvements have been made to the main controller firmware V146 and MCU firmware V80: 

1. Added new functions: Update song, Album/Artist/Genre/All songs category.

(You can view in the mode selection interface)

2. Added the cover display function in local playback mode;

3. Added 'Follow audio' option for knob indicator light.

(You can set from Settings-RGB Lights-Light color)

4. Added 'Press the volume knob' setting option.

(You can switch between 'Turn off screen/turn on screen' and 'Mute/Unmute' from'Setting-Ohters-Press the volume knob'.)

5. Added CMIIT ID display;

(In the second page from Settings - About K17)

6. Added new theme 2;

7. Optimized the popping and stuttering sound issues when cutting DSD tracks in local playback mode.

8. Optimized the U disk upgrade function

9. Optimized the Bluetooth reconnection function

10. Adjusted the song title display in my favorite from filename to title name.

11. Fixed the issue where the special characters & ^ can't be entered for wifi passwords.

12. Removed the time display in the status bar.

13.Miscellaneous UI display performance improvements and bug fixes.

1.新增功能：更新歌曲库、专辑分类、艺术家分类、风格分类、全部歌曲分类

在模式选择界面可查看

2.新增本地播放模式下显示封面功能

3.新增旋钮指示灯的“跟随音频”设置选项

在“设置-旋钮指示灯-颜色”下可以选择设置；

4.新增“短按音量旋钮”设置项，可选择“熄屏/唤醒”和“静音/取消静音”

在“设置-其他设置”下可看到此设置项

5.新增CMIIT ID显示

在“设置-本机信息”界面下第2页中显示

6.新增主题2

7.优化本地播放DSD切曲冲击声

8.优化U盘升级功能

9.优化蓝牙回连功能

10.修改我的最爱歌曲显示由原来的文件名改为歌曲名

11.修改wifi输入密码时无法输入& ^ 这两个特殊字符

12.取消状态栏时间显示

13.其他UI显示优化和bug修复