ARC over cat6

I've seen HDMI to CAT5 before, but I've never seen a HDMI-ARC to CAT5 adapter before. But that's what you'd be looking for, if it even exists. Which I doubt. The thing you need to remember is that the HDMI-ARC uses different 'pins' than regular HDMI audio does.

Another question: why? Is there some reason you can't use an HDMI cable?

Thanks for replies, much appreciated! The house was prewired and now the walls are closed with only cat6 cables at the tv location. All the equipment is remotely located on a rack in the Basement. There is no way of getting a wire there now, so trying to use what’s there. How about using an optical over cat6 converter? Then I can use the optical out from the tv and the optical to hdmi dongle to the amp.

I assume there is an HDMI cable to the TV from the rack (else how would it display anything?), so you could take the optical output from the TV and route that back over cat6 to the rack where I assume the amp is. An spdif balun on each end of the cat6 would do. But then why not just take the spdif straight out of the back of the receiver that I assume is in the rack and put that in the Amp?

If I misunderstood what you are trying to do, please post a diagram as it really isn't clear from your description.

From everything you have said, ARC is not an option unless your receiver supports it. (Again, assuming there is a receiver in here somewhere).

Agree with @ControlAV. I get that you see ARC over Cat6 as a possible solution, but if you describe the problem you want to solve a little better, perhaps there is another solution.

Are there existing speakers in the room with the TV that you want to play TV audio through? Are you TV video sources located in that TV room or down in the basement with the other equipment. What existing AV equipment is in place?

Why don't you just insert an HDMI switch that does HDMI-ARC, and put it where your cable box is? Something like this.

https://www.amazon.com/Tensun-Optical-Wireless-Supports-Blue-ray/dp/B0761S3F9X

Which you could then connect your Sonos Amp to using HDMI, since the switch box is set up to do HDMI-ARC.

Hmmm. That doesn't give you an output to send to the projector. Ignore my suggestion.

But something like that could provide you an optical output to feed the separately purchased optical to HDMI-ARC adapter that Sonos sells, that you could then plug in to the Sonos Amp.

Thanks Bruce, that’s what I’m going to try. Do you recommend any specific optical over cat5 extender? Your help has been much appreciated!!