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Small black box with HDMI ports and RCA optical outputs, .78 inches high

Mediasonic JTECH-AE4KA 4K 60Hz HDMI audio video converter with ARC

SKU CH-7DX7-47MH9 MPN JTECH-AE4KA

Extracts HDMI audio to RCA and optical outputs while passing 4K 60 Hz video, with ARC support and three EDID modes

  • TypeAudio Signal Converters
  • Changer TypeHDMI
  • Specifications2.75 L x 2.36 W x 0.78 H inches, J-Tech Digital, HDMI, 23, 6
  • Connector A1x USB 2.0 female
  • Cable Jakcet TypePlastic
  • FeaturesHDMI, 23, 6, false
  • Extract audio via RCA and Optical outputs from HDMI sources
  • Supports 4K 60Hz 4:2:0 and 4K 30Hz 4:4:4 video pass-through
  • HDMI ARC extracts TV audio through Optical output only
  • Three EDID modes selectable by toggle switch for compatibility
  • Works with laptops consoles Blu-ray players and other HDMI devices

4K 60Hz HDMI audio extractor

The Mediasonic JTECH-AE4KA extracts audio from an HDMI source and outputs it through RCA stereo and optical connections. It passes 4K video at 60Hz using 4:2:0 chroma subsampling or 4K at 30Hz with 4:4:4 to a connected display. The unit includes an HDMI ARC function to pull audio from a smart display back to an external sound system. A three-position EDID toggle switch selects between TV, 2CH, and 5CH modes for compatibility.

HDMI 1.4 and HDCP 1.4 interface limits

Video bandwidth is constrained by the HDMI 1.4 standard, limiting 4K output to 60Hz with 4:2:0 colour sampling or 30Hz at 4:4:4. The extractor does not support eARC, so enhanced audio return channel formats cannot be used. While the ARC function is active, audio is available only through the optical output; the RCA ports remain silent. The device does not downmix multichannel audio for the RCA stereo output, so the source must be set to stereo for that connection.

Stereo RCA and 5.1 optical capacity

The optical output carries up to 5.1-channel surround sound, while the RCA ports deliver two-channel stereo only. If the incoming HDMI signal carries multichannel audio, the optical port passes it through but the RCA output receives nothing unless the source is switched to stereo. The ARC function extracts display audio exclusively via the optical link. Headroom ends at the HDMI 1.4 video ceiling and the lack of internal downmixing for analogue outputs.

Highlights

  • Extract audio via RCA and Optical outputs from HDMI sources
  • Supports 4K 60Hz 4:2:0 and 4K 30Hz 4:4:4 video pass-through
  • HDMI ARC extracts TV audio through Optical output only
  • Three EDID modes selectable by toggle switch for compatibility
  • Works with laptops consoles Blu-ray players and other HDMI devices

Specifications

BrandMediasonic
SeriesJ-Tech Digital
ModelJ-Tech Digital
Part NumberJTD-3193
TypeAudio Signal Converters
Changer TypeHDMI
Specifications2.75 L x 2.36 W x 0.78 H inches, J-Tech Digital, HDMI, 23, 6, 0.5 pounds
Connector A1x USB 2.0 female
Cable Jakcet TypePlastic
FeaturesHDMI, 23, 6, false
Dimensions14.33in W x 12.83in H x 9.06in D
Weight0.5 pounds
Package Quantity1
Package Contents4K 60Hz Audio ARC Extractor

Questions about this item

Should I pick the 4K 60Hz 4:2:0 mode or the 4K 30Hz 4:4:4 mode for my setup?

Choose 4K 60Hz 4:2:0 if your source outputs it; otherwise drop to 4K 30Hz 4:4:4 or 1080P so the extractor can process the signal correctly.

What does the 4K 60Hz 4:2:0 rating mean when I connect this to my TV?

The unit passes 4K 60Hz video at 4:2:0 chroma to the display while extracting audio; if the source cannot send 4:2:0 at 60Hz you must lower the resolution to 4K 30Hz or 1080P.

Which HDMI standard does this converter use and what audio formats does that limit?

It complies with HDMI 1.4 and HDCP 1.4, supports ARC only through the optical output, does not support eARC, and passes stereo via RCA or 5.1-channel via optical.

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