Will long HDMI cables degrade over distance

[kpierce]

Hello:
I am seeing different thoughts regarding signal degradation over a long HDMI cable.

I am thinking about getting this cable for a run from my new receiver to my new projector. This will only be used for the video signal. Sounds will not be used with this cable.

Any thoughts or guidance is greatly appreciated.

4K HDMI Cable, HDMI Cord (50 feet HDMI to HDMI, Top Series) supports (4K@60HZ, 108... https://www.amazon.com/dp/B008U7SLJW/ref=cm_sw_r_sms_c_api_i_GNddEbW64MVDB

 

[Leemix]

It doesnt look like its certified so may work or may not work.
Looks like its only high speed and not premium high speed or the newest ultra high speed.

Long HDMI is very tricky and its very possible you need an optical HDMI cable for your length.
Others with more practical experience can chime in hopefully but on the forums it does look like a lot have a lot of problems getting 4k to work over distances with ˋnormalˋ hdmi cables.


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[Andrein]

A lot depends on devices on both sides of hdmi cable. I recently bought 4k tv and 4k monitor. While monitor only worked with expensive optical hdmi cable, tv works just fine with cheap one. In both cases cables were 10m long.

 

[Speedskater]

Very long digital cables don't cause poor image quality. It's a go-no go situation. Up to a some length the image is OK, a little longer it's intermittent, then a little longer still and it doesn't work at all.

 

[ryanosaur]

There have been a couple threads about this, one in particular had some great info. The decision was a fiber HDMI and an external power supply for the HDMI.

Which of these two HDMI cables would you choose and why?

So my new theater is progressing. All conduit is in and the walls will be closed by the end of the week. I will report after the walls are closed on the build thread. However, it is now time to run cable and I must choose an HDMI cable. I need 4K 18 Gbs. The run is 30 ft as this studio is a...

forums.audioholics.com

 

[TLS Guy]

I hope you read the thread that ryanosaur linked. It discusses are very difficult issue. The issues are complex.

So in essence I faced the same problem as you, but with the help of members here we reasoned out the best solution to the problem.

I'm certain this guided me to by far the best engineering solution. That solution is your best solution. Of that I can be 100% confident.

So you need a hybrid HDMI cable of the correct length. I chose Ruipro as they are the market leader in this area and there is most data on those. The power it with the C2G power inserter, so you do not draw more power from the HDMI port than spec.

So for once we can answer your question definitively. The thread linked is the best analysis and review of the problem on the NET.

 

[BMXTRIX]

First: Are you installing this cable behind drywall or is the cable going to be difficult to replace?

Second: If this is installed behind drywall as part of NEW construction, then please run conduit if you won't have access to the cable after the installation. HDMI cables notoriously fail and ALWAYS become obsolete. So, in 10 years when you want a new cable, you will want that access. 1.25" Carlon Flexible Conduit is the proper minimum size conduit to put in place between the equipment and the projector.

If you do have access, then you can certainly try the cheap cable, but the reality is that 18Gb/s HDMI signals rarely work at that distance over inexpensive cables. More specifically, the link you provided pretty much says "we don't guarantee it will work" halfway down the page. It says you may need a repeater.

If this is something you consider to be mission critical, then I would dump the $140 required for a RuiPro fiber HDMI cable...

https://www.amazon.com/RUIPRO-Fiber-18Gbps-Active-Optical/dp/B07NVFKZNH/ref=sr_1_5

I just picked up a cheaper active Monoprice 18Gb/s HDMI active cable, but I haven't put it through its paces yet.

 

[kpierce]

First: Are you installing this cable behind drywall or is the cable going to be difficult to replace?

Second: If this is installed behind drywall as part of NEW construction, then please run conduit if you won't have access to the cable after the installation. HDMI cables notoriously fail and ALWAYS become obsolete. So, in 10 years when you want a new cable, you will want that access. 1.25" Carlon Flexible Conduit is the proper minimum size conduit to put in place between the equipment and the projector.

If you do have access, then you can certainly try the cheap cable, but the reality is that 18Gb/s HDMI signals rarely work at that distance over inexpensive cables. More specifically, the link you provided pretty much says "we don't guarantee it will work" halfway down the page. It says you may need a repeater.

If this is something you consider to be mission critical, then I would dump the $140 required for a RuiPro fiber HDMI cable...

https://www.amazon.com/RUIPRO-Fiber-18Gbps-Active-Optical/dp/B07NVFKZNH/ref=sr_1_5

I just picked up a cheaper active Monoprice 18Gb/s HDMI active cable, but I haven't put it through its paces yet.

Hello:
Installing in an existing wall. I think I can get away with something a little shorter and looked at your Monoprice mention.

I see this item:
Monoprice HDMI High Speed Active Cable - 35 Feet - Gray, 4K@60Hz, 18Gbps, HDR, 26A... https://www.amazon.com/dp/B01AVG7VPE/ref=cm_sw_r_sms_c_api_i_zJMdEbDNNSERW

This cable will support my first adventure into the HDMI world and will be connecting a project that is NOT even 4K. I am replacing my Infocus Screenplay 4805 which is running on component cables. So I’m at the very bottom for requirements.

let me know once you run your monoprice cable through the paces.

many thanks to everyone that has provided input. It’s much appreciated.