Originally Posted by flyrl12
Received a 15m run of Ruipro. Nice thin cable and looks like 18gb video is fine. Two issues. One end of the wire is not properly held in the connector stress relief - the outer sleeve is free to move. Time to whip out the hockey tape and wrap that join. Also, there are audio dropouts on ARC (Sony AE1/Anthem AVM60). Tried two shorter cables in the same setup (not FO) and all is fine so the Ruipro is definitely contributing to the problem.
I probably should return it (the stress relief is a bother), but Ruipro says to keep the cable and they will soon send me something that should work better. Seems fair.
Yeah, had a 50' RUIPro which delivered pristine 4k video, no problem at all- until I tried to use the ARC function. In my case I had no return audio at all. RUIPro initially said they thought it was because I ran it too close to AC, but it was just lying across the floor and not close to any AC when I tested it, to make sure everything worked okay before installing it inside the walls and ceiling. They (RUIPro) were very nice about it and said that they would build a custom shielded cable for me, but I've seen an exploded diagram of the cable itself and if the diagram is correct it uses straight-line (non-twisted pair) small diameter conductors for the ARC function which results in relatively high resistance in a lengthy cable and more importantly doesn't make for very good transmission line characteristics of constant and matching impedance, important because while not as high in bandwidth as a video stream, we're not talking about baseband audio, we're talking about multichannel encoded data which requires a transmission line to maintain the integrity of the 1's and 0's being sent over it. You can probably get away with small, untwisted pair conductors over short cable, but not one that's 50'.
I replaced the RUIPro with a Monoprice Cabernet Active 40' cable that had significantly larger conductors which ARC worked great... for about a month-to-six weeks. Then I started having periodic short drop-outs in the ARC audio and could see the AVR's decoder dropping out at the same time, which informed me that it was having trouble decoding the ARC signal. I replaced the Cabernet cable with 2 shorter, good quality passive HDMI cables butted together with an HDMI M-M adapter, in total about 10' - 12' long, and no problems at all in the last month. Bottom line, the ARC conductors in the Cabernet were probably on the bare edge of working, and perhaps due to aging or some other unknown factor, finally began to fail.
I have not been able to find a spec for ARC in HDMI 1.4x- 2.0x other than ARC must send 'audio' back to the AVR... no mention of the 'audio' being data, or what the bandwidth of that data might be- not to say that it doesn't exist, I just can't find it. However, the standard for HDMI 2.1x cables is clearly specified, including an expanded version of the ARC function, eARC (enhanced Audio Return Channel).
I think both the RUIPro and Monoprice cables at 40-50' and possibly longer (but untested by me) are great cables IF you don't need the ARC funcion, and hopefully RUIPro will resolve their issue with ARC now that they're getting more feedback. But please bear in mind that both of these cables contain active electronics (with the exception of ARC, and all electronics are subject to failures, but if you need a cable of these lengths, at this time active cables are the only option. You can use an optical audio cable from your TV to your AVR if they support it, but you'll be limited to 5.1 audio only, which may be fine for a lot of people, but personally I want the highest quality audio available.