TABLE OF CONTENTS
The WiiM Amp Ultra features three distinct audio input ports:
- Line In
- Optical In
- HDMI ARC
You can connect devices like CD players, TVs, PCs, or turntables to your WiiM Amp 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 Amp 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 |
How to Use the Line In Port
The Line In port on the WiiM Amp 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:
- Use an RCA cable to connect the Line In port on your WiiM Amp Ultra to the Line Out port on a CD player.
- Set the WiiM Amp Ultra's source input to Line In. For details, see How to Select Audio Input on Your WiiM Device.
- Play music on the CD player. The music will stream to your WiiM Amp Ultra.
Similarly, you can connect other audio devices to your WiiM Amp Ultra via the Line In port in the same process.
How to Use the Optical In Port
The Optical In port on the WiiM Amp 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:
- Use an optical cable to connect the Optical In port on your WiiM device to the Optical Out port on a TV.
- 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.
- Set the WiiM Amp Ultra's source input to Optical In. For details, see How to Select Audio Input on Your WiiM Device.
- The audio on the TV will play on your WiiM Amp Ultra.
Similarly, you can connect other audio devices to your WiiM Amp Ultra via the Optical In port in the same process.
How to Use the HDMI ARC Port
The HDMI ARC port on the WiiM Amp 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:
- Use an HDMI cable to connect the HDMI ARC port on your WiiM Amp 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.
- 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.
- Set the WiiM Amp Ultra's source input to HDMI ARC. For details, see How to Select Audio Input on Your WiiM Device.
- The audio on the TV will play on your WiiM Amp 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 Amp Ultra via HDMI ARC.
If you encounter no sound issues with your TV, refer to HDMI ARC Troubleshooting.
How to Use Audio Input Ports with Multi-room
The WiiM Amp Ultra supports all its audio inputs—Wi-Fi/Ethernet, Bluetooth, Line In, Optical 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 Amp Ultra, you can stream audio to any other WiiM devices on the same network.
For detailed instructions, refer to the following articles:
- How to Play WiiM Multi-Room Music from Your CD Player, Turntable, or PC
- How to Stream TV Audio to Multiple Locations using WiiM Multi-room Audio Feature
HDMI ARC Troubleshooting
- When connecting your TV to your WiiM Amp 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 device's HDMI ARC port. Other HDMI ports on the TV won't transmit sound to the WiiM device.
- 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 Amp 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 Amp Ultra.