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PostPosted: 14-Sep-2005 15:28:26 
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Can you use XLR connectors for stereo signals?

The XLR connector is one of the great successes of audio. Doubtless modern science and technology could find a better solution, but the XLR doesn't have many problems, and you can use equipment with XLR connectors anywhere.

If you look at a typical XLR connector, you will see three pins or sockets, depending on whether it is a male or female connector. So you might wonder whether you could possibly run a stereo signal along one cable. After all, it would halve the number of cables, wouldn't it?

Image

Well you can do this, but it's not ideal. The reason why it is not ideal is that the XLR connector, also the cable to which it is attached, is designed to carry a balanced signal. This requires two conductors for the signal, plus the earth. Balanced signals reject interference better than unbalanced signals.

So if you did want to use an XLR cable for stereo, then you would have to run unbalanced signals. You can share the earth between the two channels with no problem. This arrangement actually works very well for headphones - better than jacks for this purpose in the studio.

So the recommendation is really not to use XLR connectors for stereo signals, unless it is for a special one-off purpose where the lack of balancing doesn't matter, and the convenience factor outweighs anything else.

In fact there are such things as 5-pin XLR connectors. The pins are always numbered and are connected as follows:

1. Screen/earth
2. Left channel hot
3. Left channel cold
4. Right channel hot
5. Right channel cold

Of course you will also need a cable with five conductors and a screen.

_________________
DA WHITE | DENNIS BALTFIRE | HARDSYNTHERZ official website: http://www.synthesiscrew.com


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PostPosted: 14-Sep-2005 16:14:28 
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Sure, you can! But nowhere in the world you'll find any 5-pole XLR's wired like that. They're mainly for DMX applications. There is no significant problem to use any connector for nearly anything, but always the compatibility is important. Imagine if you have a simple CE plug wired to speaker box- everyone will try to plug this in mains, not good, huh?

ddff
Quote:
Can you use XLR connectors for stereo signals?

The XLR connector is one of the great successes of audio. Doubtless modern science and technology could find a better solution, but the XLR doesn't have many problems, and you can use equipment with XLR connectors anywhere.

If you look at a typical XLR connector, you will see three pins or sockets, depending on whether it is a male or female connector. So you might wonder whether you could possibly run a stereo signal along one cable. After all, it would halve the number of cables, wouldn't it?

Image

Well you can do this, but it's not ideal. The reason why it is not ideal is that the XLR connector, also the cable to which it is attached, is designed to carry a balanced signal. This requires two conductors for the signal, plus the earth. Balanced signals reject interference better than unbalanced signals.

So if you did want to use an XLR cable for stereo, then you would have to run unbalanced signals. You can share the earth between the two channels with no problem. This arrangement actually works very well for headphones - better than jacks for this purpose in the studio.

So the recommendation is really not to use XLR connectors for stereo signals, unless it is for a special one-off purpose where the lack of balancing doesn't matter, and the convenience factor outweighs anything else.

In fact there are such things as 5-pin XLR connectors. The pins are always numbered and are connected as follows:

1. Screen/earth
2. Left channel hot
3. Left channel cold
4. Right channel hot
5. Right channel cold

Of course you will also need a cable with five conductors and a screen.


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PostPosted: 14-Sep-2005 17:02:40 
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Joined: 05-Oct-2004 7:34:47
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Location: Rīga
He. Kā pagarinātājs Latvietim praktiskajam jau šitāds mok noder. Bet ja jau pultī tādu neiedzīsi tad galu galā tā pat nonāks pie secinājuma ka visi vadi labāk standartā, nevis - "jā, šito iespraust var, bet neskanēs". Ja tie vadi būs grēda un viens starp tiem šāds tad diez vai gribēsies visiem skrūvēt tās galvas vaļā un skatīt kurš tad bija tas hibrīds.

ddff. Reāli bērnības atmiņu uzsita tas par CE pie skaļruņiem. Tādi (līdzīgi) arī bija, nezinu vai oriģināli, bet senos laikos 1 tāda veca tumba bija ienākusi mājās un tad nu ciema puikas arī pirmo reizi redzēdami pastiprinātāja "Radiotehnika U 7111" aizmuguri, bet skaņu gribēdami meklēja "compability" - un kā re virs 220 V AC ligzdām (2 gab.) aizmugurē uzraksts "Max 300 W" - tātad īstās. Lieki rēķināt skaņas parametrus telpā tajā brīdī būtu, atceros tik pēc kā izskatījās basu skaļrunis tajā tumbā. Tagad vēl smiekli nāk.


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 Post subject: OT
PostPosted: 15-Sep-2005 1:57:48 
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Joined: 28-Feb-2005 1:05:24
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Quote:
Imagine if you have a simple CE plug wired to speaker box- everyone will try to plug this in mains, not good, huh?
Terorisma un provokāciju vajadzībām būtu tīri OK :shock: :idea:


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 Post subject: Re: OT
PostPosted: 15-Sep-2005 10:50:26 
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Joined: 05-Oct-2004 7:34:47
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Location: Rīga
Quote:
Quote:
Imagine if you have a simple CE plug wired to speaker box- everyone will try to plug this in mains, not good, huh?
Terorisma un provokāciju vajadzībām būtu tīri OK :shock: :idea:
He hee, man gadījās saklausīt ko pie 220 dara S30 tipa RRR ražojums. Bail iedomāties kas būtu ar kārtīgu parametru koncertaparatūru.


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 Post subject:
PostPosted: 18-Sep-2005 20:59:28 
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Joined: 08-May-2004 22:56:34
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es vieknarshi raknjajos pa NETu un atradu so te, un iemetu..
-
bet ta praktiskam latvietim var ari noderet citi XLR .. ar dazhadu pin skaitu :)

_________________
DA WHITE | DENNIS BALTFIRE | HARDSYNTHERZ official website: http://www.synthesiscrew.com


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 Post subject:
PostPosted: 18-Sep-2005 21:31:44 
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var gan nodereet un arii noder- 3pin = mic/bal.line/DMX, 4pin = VAC PS, console lamps, 5pin = DMX 2ch/sets/LED DMX+PS, utt. Vienkaarshi runa par to, ka nav jeegas ienest savus standartus, kas nenodroshina universaalu komutaaciju.

ddff

Quote:
es vieknarshi raknjajos pa NETu un atradu so te, un iemetu..
-
bet ta praktiskam latvietim var ari noderet citi XLR .. ar dazhadu pin skaitu :)


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