Reference
HDMI eARC w/ SPDIF Audio over CAT Extender 100m POC
Extend TV Audio to a Remote Soundbar or AVR Over a Single CAT Cable
AUD-EXT-EARC100MUPC 813982023956
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Overview
Extends HDMI eARC or S/PDIF audio up to 100m/328ft over a single CAT cable, delivering lossless surround sound from a TV to a remote soundbar, AVR, or multi-room audio system. The transmitter connects to the TV’s eARC/ARC port and sends full-resolution audio — including Dolby Atmos and DTS-HD Master Audio — over standard CAT6/6a/7 cabling to a receiver at the remote audio endpoint.
For TVs without HDMI eARC, the built-in S/PDIF pass-through channel provides an independent optical audio path from the transmitter’s S/PDIF IN port to the receiver’s S/PDIF OUT port. Bi-directional Power over Cable eliminates the need for a power source at both ends, and CEC pass-through maintains device control across the link.
Key features
- Extend HDMI™ eARC or S/PDIF audio up to 100m/328ft over a single CAT cable
- eARC supports PCM 2.0/5.1/7.1ch, DD, DD+, DTS, Dolby TrueHD, DTS-HD MA, Dolby Atmos
- S/PDIF fallback for TVs without eARC — PCM 2.0ch, Dolby 5.1ch, DTS 5.1ch
- CEC pass-through when HDMI eARC mode is enabled
- Bi-directional PoC (Power over Cable) for flexible installation
- IEC 61000-4-2 ESD protection: ±8kV air-gap, ±4kV contact
- Compact metal enclosure (90mm × 72mm × 20mm, 184g per unit)
- CE, FCC, and UL certified (US/EU standard power supply)
| Specification | |
|---|---|
| Technical | |
| Supported Audio Formats | eARC: PCM 2.0/5.1/7.1ch, DD, DD+, DTS, Dolby TrueHD, DTS-HD MA, Dolby Atmos ARC: PCM 2.0CH, Dolby 5.1CH, DTS 5.1CH S/PDIF: PCM 2.0CH, Dolby 5.1CH, DTS 5.1CH |
| Transmission Distance | 100m / 328ft |
| ESD Protection | IEC 61000-4-2: ±8kV (air-gap) & ±4kV (contact) |
| Connection | |
| Transmitter — Input | 1× S/PDIF IN [Optical Audio Jack] • 1× eARC IN [HDMI Type A, 19-pin female] |
| Transmitter — Output | 1× CAT OUT [RJ45, female] |
| Transmitter — Control | 1× SERVICE |
| Receiver — Input | 1× CAT IN [RJ45, female] |
| Receiver — Output | 1× S/PDIF OUT [Optical Audio Jack] • 1× eARC OUT [HDMI Type A, 19-pin female] |
| Receiver — Control | 1× SERVICE |
| Mechanical | |
| Housing | Metal Enclosure, Black |
| Dimensions | 90mm (W) × 72mm (D) × 20mm (H) — TX & RX each |
| Weight | 184g (TX/RX each) |
| Power Supply | AC 100–240V 50/60Hz → DC 12V/1A (CE/FCC/UL) |
| Power Consumption | 5.65W (Max) |
| Operating Temperature | 0–40°C / 32–104°F |
| Storage Temperature | −20–60°C / −4–140°F |
| Relative Humidity | 20–90% RH (non-condensing) |
| Certifications | |
| Regulatory | CE, FCC, UL |
| Package Contents | |
| 1× | HDMI Audio Extender (Transmitter) |
| 1× | HDMI Audio Extender (Receiver) |
| 1× | 12V/1A Locking Power Adapter |
| 1× | User Manual |
There is no audio output from the receiver. What should I check?
Verify the S/PDIF/eARC switch on the transmitter matches your connection type. In eARC mode, ARC or eARC must be enabled in the TV's settings. In S/PDIF mode, confirm the optical cable is securely connected. Also confirm the CAT cable is Cat6 or higher and does not exceed 100m.
Why choose the AUD-EXT-EARC100M over a simpler ARC-only solution?
It carries the full eARC codec set -- including Dolby Atmos and DTS-HD Master Audio -- from an eARC-equipped TV to a remote AVR over a single CAT cable up to 100m, while still providing an S/PDIF fallback mode for TVs without eARC.
What is the maximum transmission distance and ESD rating?
The extender transmits up to 100m/328ft over a single CAT cable, and is rated for IEC 61000-4-2 ESD protection of plus/minus 8kV air-gap and plus/minus 4kV contact discharge.
What cable is required for the CAT run between transmitter and receiver?
Use Cat6, Cat6a, or Cat7 UTP/STP cable with direct interconnection (T568B) at both ends, up to a maximum of 100m/328ft. Do not use crossover cables; shielded (STP) cable is recommended in environments with high electromagnetic interference.
What audio formats does the AUD-EXT-EARC100M support in eARC mode?
In eARC mode it supports PCM 2.0/5.1/7.1ch, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos, DTS, and DTS-HD Master Audio.
What audio formats are supported in the ARC and S/PDIF fallback modes?
ARC mode supports PCM 2.0CH, Dolby 5.1CH, and DTS 5.1CH. S/PDIF mode supports the same set: PCM 2.0CH, Dolby 5.1CH, and DTS 5.1CH.
How does the transmitter select between eARC and S/PDIF sources?
A front-panel S/PDIF/eARC switch selects the active channel: in S/PDIF mode, S/PDIF OUT on the receiver carries the transmitter's S/PDIF IN audio; in eARC mode, eARC OUT carries the transmitter's eARC IN audio, with full-resolution formats up to Dolby Atmos and DTS-HD Master Audio.
What is required on the TV for CEC pass-through to function?
CEC pass-through is only available in eARC mode. The TV must have ARC/eARC and CEC enabled in its settings (labeled Anynet+, BRAVIA Sync, or SimpLink depending on brand).
How is the AUD-EXT-EARC100M powered, and do both units need separate adapters?
No. Power over Cable (PoC) is bi-directional, so only one 12V/1A locking power adapter is required -- connect it to either the transmitter or the receiver and power reaches both ends over the CAT cable.
What are the dimensions and weight of the TX and RX units?
Each unit (transmitter and receiver) measures 3.54 in x 2.83 in x 0.79 in (90 x 72 x 20mm) and weighs 0.41 lbs (184g), in a metal black enclosure.
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