J-Tech Digital Digital Audio Extender Converter for Optical/Coaxial Audio Over Single Cat5e/6 Cable (PoC) up to 990’ (300m) for Dolby Digital, DTS 5.1, DTS-HD, PCM [JTECH-AET1000]

I encountered a situation during an installation where the distance between the TV and the media closet rendered the existing HDMI cable incompatible with a 4K device. To facilitate audio transmission between the two locations promptly, I utilized an available Ethernet connection. Initially, I had modest expectations for the performance of this device based on prior reviews. However, in my experience, I encountered no issues with sound quality, volume, or surround sound. Everything functioned flawlessly, which was very satisfying.

When TV operate as a monitor for signals sent from an AV switcher or amplifier, the audio came out of the amp too. But nowadays, TV's are far more than just monitors: they're the epicenter of the streaming services- the source for the imagery AND the audio. Now the information is going out of the TV instead of into it. So how to you get the audio back to that nice remote 7.1 amp and in-wall speakers you installed 6 years ago? There is something called ARC (Audio Return Channel). This is supposed to output the audio signal through an HDMI cable to an amp. I bought converters to change the ARC signal to cat 5 and back again. (I only have cat5 in the walls) This did NOT work for me. And from what I understand, ARC tends to not work very well.These J-tech boxes do something similar, but they do it with the TV's optical audio signal output. It converts the optical signal to Cat5, then back to optical audio, then into the amp. The only issue is that you will have to provide power to the transmitter unit, which can be tricky in the spaces behind a wall mounted TV. No latency, sounds great, and fewer remotes on the coffee table. Highly recommended.

Works great for connecting the optical output from my TV to a remote media rack. Nothing to configure - just plug in optical cables, Ethernet cables, and the power supply. The power supply can only go on one side of the link, so make sure that is OK for your use case.

Update: after five hours of troubleshooting, purchasing new cables at Jtech's direction, and two sets of these, Jtech finally admitted over email that this product CANNOT ESTABLISH OR MAINTAIN HDMI HANDSHAKES. That means IT DOES NOT WORK, they know it, and have no intention of making it work. They also refused to refund my purchase because it was outside a 30 day window. It was outside the window because I spent literally weeks troubleshooting it and shipping these back and forth to them. NEVER BUY A JTECH PRODUCT.This worked for about an hour in the initial test, then ARC audio never worked again for cable runs more than 3 feet. CEC control still works (turns on the receiver and controls volume setting), but no audio is transmitted. I tried three different ARC compatible receivers, two ARC TVs, three confirmed-good ARC-compatible HDMI cables. Triple checked all settings across all devices. If I use a CAT cable longer than 3 feet, I get no audio. $80 down the drain.

My receiver is an older receiver that only has optical inputs. My tv is quite far away and has an optical out. Luckily, I had run network cable through the walls a long while back. I found this product and it allowed to go optical out from the tv into 1 end of this dive, then network cable. The other end, network cable into this device, optical out to the receiver. It works without any configuration, I don't see any delay in the audio. It just worked out of the box and saved me from buying another receiver.One point to note: the optical cable only transmits dolby digital if I'm not mistaken. If you want Dolby Atmos, you would have to use HDMI-ARC or eARC so this is not likely the right solution for that. Still most of the content I watch is dolby digital for now and so this is sufficient for a while.

Works exactly as described as well as working with 48khz 24 bit 8ch. ADAT.

Worked great, no issues!

These worked, but unlike the discription they are directional. There is 1 power supply, 1 transmitter and 1 receiver. They will not work if the source is plugged into the receiver. The the power plug is located on the transmitter module. Make sure this will be okay for your application.