TABLE OF CONTENTS

The WiiM Ultra features four distinct audio input ports: 

  • Line In
  • Optical In
  • HDMI ARC
  • Phono In

You can connect devices like CD players, TVs, PCs, or turntables to your WiiM Ultra via these input ports for high-quality playback with reduced latency.

Supported Audio Format and Quality for HDMI ARC and Optical In

The following table shows the supported audio formats and quality for the HDMI ARC and Optical In ports on the WiiM Ultra:

Ports Supported Audio Formats Supported Audio Quality
HDMI ARC PCM, Dolby Digital Up to 24-bit/192 kHz
Optical In PCM, Dolby Digital Up to 24-bit/192 kHz
The WiiM Ultra does not support Dolby Atmos or DTS audio formats.

How to Use the Line In Port

The Line In port on the WiiM Ultra is typically used to connect a CD player, a turntable with a built-in preamp, or a PC to receive analog audio input. 

This example shows how to use the Line In port to connect a CD player:

  1. Use an RCA cable to connect the Line In port on your WiiM Ultra to the Line Out port on a CD player.
  2. Set the WiiM Ultra's source input to Line In. For details, see How to Select Audio Input on Your WiiM Device.
  3. Play music on the CD player. The music will stream to your WiiM Ultra.

Similarly, you can connect other audio devices to your WiiM Ultra via the Line In port in the same process.

How to Use the Optical In Port

The Optical In port on the WiiM Ultra is typically used to connect to a TV or PC to receive digital audio input.

This example shows how to use the Optical In port to connect a TV:

  1. Use an optical cable to connect the Optical In port on your WiiM device to the Optical Out port on a TV.
  2. Go to your TV's audio settings and select the optical or digital audio output. Set the digital audio format to Stereo PCM or Dolby Digital. The exact setting names vary by TV model.
  3. Set the WiiM Ultra's source input to Optical In. For details, see How to Select Audio Input on Your WiiM Device.
  4. The audio on the TV will play on your WiiM Ultra.

Similarly, you can connect other audio devices to your WiiM Ultra via the Optical In port in the same process.

How to Use the HDMI ARC Port

The HDMI ARC port on the WiiM Ultra is typically used to connect to a TV to receive digital audio input.

This example shows how to use the HDMI ARC port to connect a TV:

  1. Use an HDMI cable to connect the HDMI ARC port on your WiiM Ultra to the HDMI ARC port on your TV. Note: ensure you use the HDMI ARC port on your TV. Other HDMI ports won't transmit sound to the WiiM devices.
  2. Go to your TV's audio settings, enable HDMI ARC, and select the HDMI ARC or external audio system output. Set the digital audio format to Stereo PCM or Dolby Digital. The exact setting names vary by TV model.
  3. Set the WiiM Ultra's source input to HDMI ARC. For details, see How to Select Audio Input on Your WiiM Device.
  4. The audio on the TV will play on your WiiM Ultra.

To play audio from a PC, Blu-ray player, or another HDMI source device, connect it to your TV first. Then send the TV's audio to your WiiM Ultra via HDMI ARC .

If you encounter no sound issues with your TV, refer to HDMI ARC Troubleshooting.

How to Use the Phono In Port

The Phono In port on the WiiM Ultra is designed for connecting a turntable without a built-in preamp. It supports two phono cartridge types: 

  • Moving Magnet (default) 
  • Moving Coil 

To ensure the best sound quality, select the appropriate phono input type based on your turntable's cartridge. For detailed instructions, see How to Connect a Turntable with Your WiiM Ultra.

How to Use Audio Input Ports with Multi-room

The WiiM Ultra supports all its audio inputs—Wi-Fi/Ethernet, Bluetooth, Line In, Optical In, Phono In, and HDMI ARC—as sources for your multi-room audio system. By connecting an audio source device (e.g., a CD player, a turntable or a TV) to your WiiM Ultra, you can stream audio to any other WiiM devices on the same network.

For detailed instructions, refer to the following articles:

HDMI ARC Troubleshooting

  • When connecting your TV to your WiiM Ultra via an HDMI cable, ensure you use the HDMI ARC port on your TV. Connect a Blu-ray player to the TV rather than directly to the WiiM Ultra's HDMI ARC port. Other HDMI ports on the TV won't transmit sound to the WiiM Ultra.
  • If you experience no sound, ensure that the HDMI ARC output on your TV is activated. For details, see Troubleshooting No Sound Issues with HDMI TV Input on WiiM Devices.
  • If there are control issues between your TV and your WiiM Ultra, verify that HDMI-CEC control is enabled on your TV.
  • If your TV lacks an HDMI ARC port, connect the Optical Out port of your TV to the Optical In port of your WiiM Ultra.