How to Set Up and Troubleshoot the Cable Matters 48Gbps HDMI 2.1 Audio Extractor with eARC (Model 103104)

The Cable Matters 48Gbps HDMI 2.1 Audio Extractor with eARC (Model 103104) de-embeds audio from an HDMI source or TV with eARC/ARC, outputting to HDMI, digital S/PDIF (optical), or analog audio devices like soundbars, amplifiers, or AV receivers. It supports up to 8K@60Hz video and advanced audio formats (e.g., Dolby Atmos, DTS:X), with features like CEC control and EDID management.

Important Notes Before Using

Setup Guidance

  1. Unpack and Verify Contents:
    • 1x 48Gbps HDMI Audio Extractor
    • 1x 5V/2A International Power Supply
    • 1x 6 ft HDMI 2.1 Cable
    • 1x User Manual
  2. Connect the Devices:
    • Power: Plug the 5V/2A power supply into the “DC 5V” port and a wall outlet. The red Power LED should light up.
    • HDMI Source: Connect your HDMI source (e.g., Blu-ray player, gaming console) to the “IN Source” port using an HDMI 2.1 cable (max 3m/10ft recommended). The green IN LED should illuminate.
    • TV: Connect the “OUT TV (eARC)” port to your TV’s HDMI eARC/ARC port with an HDMI 2.1 cable. The green OUT LED should light up.
    • Soundbar (Optional): For eARC/ARC audio, connect your soundbar’s HDMI Output to the “eARC OUT Soundbar” port. The green Soundbar LED should activate.
    • Amplifier (Optional): Connect an amplifier to the “AUDIO OUT Amp” port (HDMI) or “OPTICAL” port (S/PDIF) for non-eARC setups. The green Amp LED should light up if connected
  3. Enable eARC/ARC (If Needed):
    • Press the “eARC” button to toggle eARC/ARC mode:
      • On (Solid eARC LED): Audio returns from the TV (eARC/ARC enabled).
      • Off (No eARC LED): Audio comes from the HDMI input source
    • Ensure your TV’s eARC/ARC setting is enabled in its audio menu.
  4. Configure EDID (Optional):
    • Use the EDID DIP switches (labeled “EDID OP”) to adjust audio/video compatibility:
      • Default (111): Factory settings—try this first.
      • Refer to the manual for other settings if audio/video issues occur 
        
  5. Test the Setup:
    • Power on all devices. Check that LEDs (Power, IN, OUT, Soundbar/Amp, eARC) match your setup. Play content to confirm video on the TV and audio through your soundbar or amplifier.

Troubleshooting Guide

  1. No Video or “No Signal” on TV:
    • Verify that the TV’s HDMI input is set to the eARC/ARC port connected to “OUT TV (eARC).”
    • Ensure the source is plugged into “IN Source” and powered on (IN LED should be green).
    • Test with a different HDMI 2.1 cable (max 3m/10ft) for both input and output
  2. No Audio or Audio Skipping:
    • Confirm connections: “OUT TV (eARC)” to TV’s eARC port, “eARC OUT Soundbar” to soundbar’s HDMI output, or “AUDIO OUT Amp”/“OPTICAL” to an amplifier.
    • Test direct connection: Connect the TV’s eARC port straight to the soundbar to isolate the extractor.
    • Adjust TV audio output: Set to PCM or Dolby Digital first, then retry Atmos/DTS:X.
    • Power cycle: Unplug all devices (extractor, TV, soundbar) for 1-2 minutes, then reconnect
  3. Intermittent Connection or Flickering:
    • Test with a different display or soundbar to check compatibility.
    • Reset the EDID to factory default (DIP switches to 111).
    • Ensure cables are HDMI 2.1-rated and under 3m/10ft
  4. eARC Not Working (Flashing eARC LED):
    • Verify that the TV and soundbar support eARC and that it’s enabled in their settings.
    • Press the eARC button to toggle mode—solid LED means eARC is active; flashing means a CEC/eARC issue.


Article ID: 184
Last updated: 02 Aug, 2026
Revision: 5
HDMI -> Devices -> How to Set Up and Troubleshoot the Cable Matters 48Gbps HDMI 2.1 Audio Extractor with eARC (Model 103104)
https://kb.cablematters.com/index.php?View=entry&EntryID=184