The HDMI Cat5 network extender that was installed in a house that I recently bought died. The old system worked fine as a one way with my old 46 in Samsung from 2007, but once the TV was updated to a TCL Roku 65 inches with smart TV. It was very frustrating to not get a return from the TV to the receiver. Fast forward 12 months and the extender died, so I did some research and I found and purchased a new one from AV Access with HDMI 2.0 ARC extender (model 4KEX70-ARC-H2) here on Amazon.
I was crossing my fingers as the sole reason to purchase this one was ARC and 4K return. I checked all the reviews and this one seemed to be the unit to purchase. My installation was typical and the distance between the transmitter and the receiver was well within the limits.
As I mentioned, my goal was to get it to work with a typical installation (BluRay sending signal to the TLC Rody TV and the TV sending the signal back to the AV Yamaha RX-V575). I did upgrade the HDMI cables to 2.0 for the return. All new cables and the receiver and transmitter so the installation was supposed to be a breeze. And for the most part it was a very straight forward. The extender to the TV worked great seeing in 4K Terminator 2, with phenomenal sound and video. No interruptions or flickering.
The challenge came with the ARC return back to the AV. Initially, it only worked for 3 seconds, and then stopped and the audio went completely silent. I checked the receiver following all the instructions and making sure the ARC was on. I unplugged the HDMI cable out of the TV, the TV speakers worked, and then, when I plug the HDMI cable the sound sounds in the AV speakers for a couple of seconds before it went silent again. I tried with Disney+, Hulu, Amazon video, Vudu, and all had the same issue. For some reason, the TV was trying to send a signal that was not being picked up by the receiver. I was able to control the TV audio sound from the receiver by turning ARC off (sound came out of the TV speakers but not 5.1 surround) and off (no sound coming out the 5.1 surround).
It turns out that my TCL Roku TV was set-up in Auto for the CEC-ARC return. It turns out that after an update, the only option that sends the return sound is PCM-Stereo. This is interesting because after making the adjustment to PCM-Stereo, I receive full sound 5.1 from my Roku smart TV when I stream back to the receiver using all the different smart apps (Amazon Prime Video, Disney +, Hulu, etc). I was concerned about the quality of the cat 5 cable, because mine is cat 5 and not cat5e or all the above.
You can get a cheaper extender if you do not want 4K or ARC, so I was really concerned about not getting all the features working (you can get a cheaper version for less features). However, like other posts mentioned the email support from this company is top notch. I sent them an email Sunday morning and I got a response Sunday evening by Ryan at [****] or [****]. Luckily, I had already solved the problem so I sent them an email back. They told me that the product has a 12 month guarantee and customer support so should not worry. So far, I am very happy with the sound that the TV is sending back to the receiver. I can fully utilize the 5.1 surround system that was built in the house and the quality is way superior to the TV speakers. I would definitely give a chance to the products by AV access. If it does not work with your current configuration the customer support will try to help you very quickly and if it does not work with your hardware, or it is faulty, you can always return it.

Works perfectly for ARC. I plugged it in, units synced up, and everything works great. I now can use my Samsung TV remote to control the TV, apps, and other peripherals. The Yamaha receiver is in a separate closet, and the TV now turns the receiver on/off, controls volume, and makes the room shake nicely. All with just the one Samsung remote and no clever programming needed.

This is probably my second review ever, but the company asked if I would share my thoughts on the experience with the Extenders, and since they were so helpful, figured I would oblige. Being completely honest, I’m not super “techy”, more joe average user, so take my review with a grain of salt (as they say).
I purchased the 2.0 Arc extender as I had about a 40FT run from my new Sony 4K TV to my AV receiver. I had read that HDMI gets a little “iffy” much past 25ft, so I ran CAT6 and planned on this extender system instead.
Setup and installation was pretty easy… really for most part it’s just plug and play. Currently I’m running Apps (YouTube TV, Prime…etc) on TV (internet via CAT6), which then transmits from the ARC output from the extender to my AV receiver which then gives me the surround sound. Admittedly, I have not invested in 4K devices like PS5 or 4K Blu-ray player to run it in reverse (from receiver to TV), though I have done this with regular 1080P Blu-ray and an old Xbox 360 which worked just fine.
Customer service is really good. Admittedly the first unit I received had some issues early on where the my picture was cutting in and out. I dealt with Ryan Xiebel where I could send an e-mail in the evening (I’m in the EST time zone) and would have a response in the AM. After a couple technical checks, Ryan coordinated an exchange of the unit. I was a little leery about the process only because I was sending the unit back at my expense (to a US location), though in the end they credited back the amt to my order, and sent out the brand new unit. If I had to make a suggestion to AV Access it would be to coordinate shipping labels so the customer doesn’t need to take the leap of faith in the credit process. It all worked out though… and I’ve been using the extender for about 5 months with no issues (now that I say that, I hope I don’t jinx myself!). Thx.

I needed a transmitter and receiver to send audio through Ethernet cables from my tv to my receiver room all the way upstairs. I tried another product but it didn’t support the audio ARC. This product works perfectly!

Just what I needed for ARC I had a HDMI extender that didnt have ARC capability but got a new Samsung NQ90A 75" TV and wanted to use the the ARC feature of the TV with my Denon 3400H AVR surround system. Setup is as follows: an HDMI 2.0 cable from the Denon AVR output port (It is the white one that is marked for ARC) to the AV Access HDMI 2.0 ARC Extender (Transmitter Unit) , then the Cat6 line (50' length) to the back of the TV where I have the AV Access HDMI 2.0 ARC Extender (receiver unit) mounted, to another HDMI 2.0 Cable plugged into the HDMI arc port on the TV. The Transmitting unit was plugged into the outlet. The TV recognized the AVR automatically (make sure you have the HDMI settings for ARC in the Denon turned on first). The TV remote is able to turn the AVR on/off with the TV and easily raise and lower the volume in Dolby Surround with 4k picture. Great product!