Name: 4K HDMI Extender (50m) with eARC & S/PDIF Audio Return
Brand: KanexPro
SKU: EXT-HD4KEARC-50M

Question 1

What is the maximum video resolution and HDCP compliance?

Accepted Answer

The EXT-HD4KEARC-50M is HDMI 2.0b / HDCP 2.2 compliant with 18Gbps video bandwidth, supporting up to 4K2K@60Hz 4:4:4 24-bit. Supported resolutions include 480i60, 576i50, 480p60, 576p50, 720p50/60, 1080i50/60, 1080p24/25/30/50/60, 4K2K 24/25/30, 4K2K50/60 4:2:0, 4K2K50/60 4:4:4, plus PC timings up t

Question 2

What is the maximum transmission distance?

Accepted Answer

The extender reaches 50m/164ft over a CAT6/6a cable at 4K2K@60Hz.

Question 3

How do I enable eARC audio return?

Accepted Answer

Set the RX eARC/S-PDIF dial switch to x1 for eARC mode. TV audio, including Dolby Atmos and DTS:X, returns over the CAT cable to the TX S/PDIF OUT for delivery to an AVR.

Question 4

How do I use S/PDIF mode for TVs without eARC?

Accepted Answer

Set the RX dial switch to x0. Connect the TV's optical S/PDIF output to RX S/PDIF IN; audio returns over the CAT cable to TX S/PDIF OUT, supporting PCM 2.0, Dolby 5.1, and DTS 5.1.

Question 5

What cable is required and are there any precautions?

Accepted Answer

A CAT6/6a cable connects TX CAT OUT to RX CAT IN. Surge protection is recommended, since the unit's sensitive electrical components can be damaged by electrical spikes, surges, or lightning strikes.

Question 6

What are the unit dimensions and weight?

Accepted Answer

TX and RX each measure 3.82 x 3.23 x 0.71 in (97 x 82 x 18mm); TX weighs 0.44 lb (199g) and RX weighs 0.43 lb (196g).

Question 7

No video on the display connected to the receiver. What should I check?

Accepted Answer

Verify the CAT6/6a cable is properly connected between TX CAT OUT and RX CAT IN, confirm the green Link Status LED is lit on both units, check that the source is outputting an HDMI signal (solid yellow Signal Indicator), try a different HDMI cable, and ensure the CAT run does not exceed 50m.

Question 8

No eARC audio at the amplifier connected to TX S/PDIF OUT. What should I check?

Accepted Answer

Confirm the RX dial switch is set to x1, verify the TV supports and has eARC enabled, use an HDMI cable that supports eARC between RX OUT (eARC) and the TV, and try setting the EDID DIP switch to [11] for automatic handshake.

Question 9

What problem does this extender solve for eARC-equipped displays?

Accepted Answer

It extends 4K60 HDMI up to 50m over a single CAT6/6a cable while returning eARC audio, including PCM 7.1, Dolby Atmos, and DTS:X, from the TV back to the source end on the same cable, avoiding a separate audio return run.

Question 10

Why does dual-mode audio return matter for retrofit jobs?

Accepted Answer

The RX dial switch selects eARC or S/PDIF mode, letting the same extender serve both eARC-capable TVs and older TVs with optical-only audio return, without swapping hardware.