Studio 6: Q&A 0 - Balanced Audio over Ethernet Cabling?
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- čas přidán 27. 07. 2024
- Sam buys some junk at a hardware store and kitbashes up an XLR to RJ-45 adapter to see if it works.
And by "ethernet cabling," I do mean ethernet cable. As in cable used for ethernet. Sure, you could call it "unshielded Cat5e twisted pair," but no one will admit to knowing what you mean. So it's ethernet cable.
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0:00 Soldering!
20:44 Assembly!
29:44 Testing!
35:34 Summarying! - Věda a technologie
Here's my experience using cat 5 on long runs. At a local drive-in theater we use both cat 5 utp and stp Cable with both Dave Rats products and our in house made equipment and have come to learn these rules. 1) no unbalanced signals on long runs shelded or not. 2) use stp especially for fund greater than 100 feet. 3) use only shelded for mic level. 4) when working with line level ground the sheld at the end of lowest impedance (( usually the source end )). 5) if terminating to a balanced load of a high impedance drop a 125 ohm 1/4 watt resistor across the input if your source will tolerate that low of an impedance. These rules have helped us keep hum and Rf from our transmitters out of our audio.
I know what you need, one of them panavise, I use one and it's great, especially when I rebuilt one of the radio stations I do engineering at
You should use cable glands at that gang box, will save from unexpected pulls snapping of the keystone.
I have done for mine, also am running 4 channel and an external common ground.
Cat6 and Cat7 connectors do have a shield connection built-in. The jacks themselves have a metal shielding, and the sockets have little tabs inside that connect to the shield. So it would be theoretically possible to run one more channel through a shielded cable.
Good to know for the future, but I suspect cat6 panels with drain management might have been a little out of my price range.
Thanks for the infor great man 👍👍
Since the boxes have space for two keystone's you could theoretically have 6 channels per box and running 2 cat5 cables right?
You should check out Dave Rat's videos on this! He's done comparisons between shielded cat5e and a proper whirlwind w1 audio snake and found the performance to be better with the cat5. Because data cables like cat5, cat6 etc. are designed to operate effectively at frequencies well over 100kHz, you end up with a cable that does not alter the frequency response/suppress higher frequencies with longer runs. There can still be signal drop, but the important thing is it will be linear. Dave Rat even did a massive MILE LONG cat5e test and the difference (or lack thereof) is truly amazing. He also tested crosstalk and found that to be a non-issue as well, because of the twisted pair nature of the cables!
Just saw those videos the other day, in fact. Bandwidth wasn't a concern of mine for the reasons you stated, but the losses were. They were a lot less than what I was led to expect by other folks, so I went with cat5e pretty much everywhere in the broadcast desk, only moving to some Belden instrumentation cable for direct connections to equipment that needed it.
@@WaveformOrcahardSam Gotcha, gotcha. Yeah, it seems as though signal loss is essentially a non-issue for most sensible signal runs around a studio, given negligible signal drop is present even with distances around and above 100 meters.
Hey! can you review the symetrix 528? tnks!
Hi, did you use a common ground across all ends? Does that cause any issues - many forums do not recommend a common ground.
I did. Separating the grounds on shorter runs, especially when one end terminates in the same device, as is the case here, is of limited usefulness.
If recording live music through a good microphone connected in this manner, would there be more chance of hum than a high quality XLR?
Short form, not really. A lot of the concerns that XLR cable is designed to address are also addressed in the CAT5 & above spec, to varying levels. At this point I've wired my entire broadcast desk with cat5e and nary a buzz, save for one place where I'm carrying unbalanced audio and 16v AC, where there is slight 60hz. But that's not in the recording chain.
Cool, any chance you could put the links to where to find the parts?
The search phrases you're going to want to use are "RJ-45 and keystone," but I bought them retail so I don't have specific links.
The XLR connectors were out of my recycle bin, and the parts were just bought from a well known orange-themed big box store. The cable was off of a commodity cat5e spool I bought at a hamfest years ago. The point of the test was to see if I could do it without buying specialized equipment.
@@WaveformOrcahardSam thanks, but what gauge cable did you use for the XLR connections? the ones that normaly come with XLR wires are way thicker than the ones you used. care to share?
@@efraingonzalez4642 I used standard cat5e cable, generally used for ethernet. I have a large spool of it for other work that I do.
EDIT: Sorry, you meant to the XLRs, didn't you? That's Belden 9451.
Do you do custom rj45 audio junction jobs for using a ethernet as a audio snake with 48v phantom power eight channels
I'm not doing phantom power over the cat5e at the moment since the microphones I use don't require it. I have some condensers I could test with at some point in the future though.
@@WaveformOrcahardSam thanks for getting back , great videos by the way --- keep me in the loop on future projects
Google AES72...
Heh, I'm aware of that now. I was only familiar with it regarding digital audio. A case of not being able to google what you don't know.
Do you do
I enjoyed it up to the point where you were compelled to cite atheism. Sorry, man. Good luck with that.