Name: HDMI eARC w/ SPDIF Audio over CAT Extender 100m POC
Brand: KanexPro
SKU: AUD-EXT-EARC100M

Question 1

What audio formats does the AUD-EXT-EARC100M support in eARC mode?

Accepted Answer

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.

Question 2

What audio formats are supported in the ARC and S/PDIF fallback modes?

Accepted Answer

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.

Question 3

How does the transmitter select between eARC and S/PDIF sources?

Accepted Answer

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.

Question 4

What is required on the TV for CEC pass-through to function?

Accepted Answer

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).

Question 5

How is the AUD-EXT-EARC100M powered, and do both units need separate adapters?

Accepted Answer

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.

Question 6

What are the dimensions and weight of the TX and RX units?

Accepted Answer

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.

Question 7

There is no audio output from the receiver. What should I check?

Accepted Answer

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.

Question 8

CEC commands are not passing through. What should I check?

Accepted Answer

CEC pass-through is only available in eARC mode, so confirm the switch is set to eARC and that both the TV and the receiving device (soundbar/AVR) have CEC enabled. Some TV brands label CEC differently (Anynet+, BRAVIA Sync, SimpLink).

Question 9

Why choose the AUD-EXT-EARC100M over a simpler ARC-only solution?

Accepted Answer

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.

Question 10

What installation benefit does bi-directional PoC provide?

Accepted Answer

Bi-directional Power over Cable means only a single power adapter is needed for the TX/RX pair, simplifying cable runs to equipment racks or ceiling spaces where running two separate power drops would be impractical.