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Small black adapter box with short HDMI and optical cables attached

Boxwave

Boxwave 192KHz HDMI ARC to Optical Audio Adapter 3.7ft 1.15m

SKU CH-4CT3-BEM32

Converts HDMI ARC TV audio to optical for soundbars with 24-bit/192 kHz sampling and Dolby/DTS 5.1 support

  • TypeAdapters
  • Connect TV audio to a soundbar via HDMI ARC and optical output
  • 24-bit 192kHz sampling delivers clear digital sound quality
  • Plug-and-play setup works without extra cables or converters
  • Supports PCM Dolby 5.1 and DTS 5.1 formats for immersive audio
  • Built-in 3.7ft optical cable and USB power simplify installation

ARC Audio Converter for TV Soundbar

This adapter connects an ARC-compatible television to a sound system using a built-in optical SPDIF cable. It is designed for users who need to extract audio from a TV ARC port to an optical input on a soundbar or home theatre receiver. The 3.7ft length suits typical living-room setups where devices sit near each other. It does not work with eARC or standard HDMI ports lacking ARC functionality.

Plug-and-Play Installation Steps

Power the unit by plugging its USB cable into a TV USB port or alternate USB source; the LED indicator confirms the connection. Set the television audio output to PCM, Dolby 5.1 or DTS 5.1 in the TV settings menu. No driver installation or external power brick is required. The converter will not function if the TV lacks an ARC label or if the sound system cannot decode Dolby or DTS formats.

192kHz Sampling Under Continuous Use

The adapter supports 24-bit/192kHz audio sampling for sustained playback of movies, music or conference calls. Audio passes through the optical link without re-compression once the TV format is configured correctly. Performance remains stable as long as the USB power source stays active and the ARC handshake is maintained. The device does not amplify signal strength beyond the standard optical specification.

Highlights

  • Connect TV audio to a soundbar via HDMI ARC and optical output
  • 24-bit 192kHz sampling delivers clear digital sound quality
  • Plug-and-play setup works without extra cables or converters
  • Supports PCM Dolby 5.1 and DTS 5.1 formats for immersive audio
  • Built-in 3.7ft optical cable and USB power simplify installation

Specifications

TypeAdapters

Questions about this item

How do I confirm the Boxwave adapter is working after connecting it?

The LED indicator lights up when the HDMI ARC connection is active and the USB power cable is plugged into a TV USB port.

What comes in the box and what must I supply separately?

The adapter includes a built-in 3.7 ft optical SPDIF cable and a USB power cable; you only need a TV with an ARC port and a sound system with an optical input.

Which audio format setting should I choose on my TV for this adapter?

Set the TV audio output to PCM, Dolby 5.1 or DTS 5.1; the adapter supports 24-bit/192kHz sampling for those formats.

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