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If Windows update causes the device to be unrecognized, 

please update all windows components and reboot, retest. 

Please contact us for a solution.

8. How to do plug-and-play on Windows?

- Just click the sound icon in your notification area.

- Click the “Select playback device” option.

- Select the playback device: “Fosi Audio K1”.

9. I can't play Spotify music in Plug-and-Play mode?

- Please exit the Spotify app and switch the playback device to 

  the computer's own sound card device, open Spotify and play,

  confirm that it works and then switch the playback device to 

  “Fosi Audio K1”.

11. Why do I get an intermittent sound?

- Please switch the USB port to USB 3.0 or back USB port and 

  try again, as some USB ports have unstable data transmission.

- Please replace the PC-USB cable and retest, contact us for 

  compensation if the original cable is faulty.

10. How do I get the highest 24Bit/96kHz resolution 

on my PC?

- Right-click the PC sound icon in the lower right corner, open 

  Volume Mixer, click on the icon of the device/SPDIF: 

  “Fosi Audio K1” to open the Properties, click the Advanced, 

  select 24Bit, 96000Hz for maximum sound quality output.

- Expand Universal Serial Bus controllers. Press and hold 

  (or right-click) a device and select Uninstall. Repeat for 

  each device. 

- Once complete, restart your computer. Your USB controllers 

  will automatically install.

Summary of Contents for K1

Page 1: ...Fosi Audio DAC K1 User s Guide L R OUT Mode volume ...

Page 2: ... 5V 0 001 110dB 3 70 x 2 79 x 0 90 Inch 94 x 71 x 23 MM 140g RCA Output Level 2V QCC3003 STM32070F6P6 MS8416 PCM5100 MAX97220 The K1 is an ultra miniature digital to analog converter decoder designed to provide maximum versatility for a wide range of digital devices with Bluetooth 5 0 USB optical and coaxial digital signal inputs classic 3 5mm 1 8 headphone jack and RCA outputs Fosi Audio K1 ensur...

Page 3: ... Multi function Knob 1 Long Press To Power On Off 2 Volume Control 3 Input Switch PC USB Input OPT Intput COA Input Power Input Indicator Light Antenna Interface Bluetooth Antenna L R OUT Mode volume Input DV 5V Red OPT Green COA Wihte USB Blue BT RF PS E ...

Page 4: ...ct the K1 to the PC via the PC USB cable Step 4 Connect the headphones to the 3 5mm 1 8 headphone jack and turn down the volume control to lowest level Quick Setup PC Windows for example Fosi Audio K1 1 Bluetooth Antenna 1 PC USB Cable 1 Optical Cable 1 Micro USB Power Cable 1 User Manual 1 Package Contents Input DV 5V Red OPT Green COA Wihte USB Blue BT RF PS E PC PC USB Cable Micro USB Power Cab...

Page 5: ...he volume control to lowest level Step 4 Long press the multi function knob to turn on the unit short press the multi function knob to select Bluetooth input mode the indicator light flashing blue L R OUT Mode volume Bluetooth for example Step 5 Long press the multi function knob to turn on the unit short press the multi function knob to select USB input mode the indicator light stays on white Ste...

Page 6: ......

Page 7: ...close your device to K1 have to try Make sure there are no obstacles between your device and K1 obstacles will affect the Bluetooth operation distance Please try to change another Bluetooth audio source to test Restart the K1 and then try to connect again try to use another brand of mobile phone 3 Why Bluetooth is intermittent Make sure that K1 is powered on and the indicator light flashing blue N...

Page 8: ...d try again as some USB ports have unstable data transmission Please try again with another device Please replace the PC USB cable and retest contact me for compensation if the original cable is faulty Please change the power supply adapter and retest why Because of the ageing of the power supply there may be an abnormal power supply resulting in white noise We recommend that you connect the Micro...

Page 9: ...dio K1 11 Why do I get an intermittent sound Please switch the USB port to USB 3 0 or back USB port and try again as some USB ports have unstable data transmission Please replace the PC USB cable and retest contact us for compensation if the original cable is faulty 10 How do I get the highest 24Bit 96kHz resolution on my PC Right click the PC sound icon in the lower right corner open Volume Mixer...

Page 10: ... mind Great sound simple but elegant designs high quality materials and truly useful features are what Fosi Audio is about We sincerely hope you get as much enjoyment from our products as we ve had to create them Our website www fosiaudio com Amazon store www amazon com fosiaudio Our Youtube channel Fosi Audio Our Facebook page Fosi Audio After sale Service and Technical Support Email support fosi...

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