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double-run cable

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15:21 Jun 28, 2004
This question was closed without grading. Reason: No acceptable answer

English to French translations [PRO]
Tech/Engineering - Electronics / Elect Eng / electrical cable
English term or phrase: double-run cable
this regards electrical cables
jmleger
Local time: 14:33
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Summary of answers provided
2je dirais : un câble double
Jean-Luc Dumont


Discussion entries: 1





  

Answers


8 hrs   confidence: Answerer confidence 2/5Answerer confidence 2/5
je dirais : un câble double


Explanation:
deux longueurs de câbles dans une même gaine

les câbles peuvent être unifilaires ou bifilaires
double-run single wire cable ou double-run biwire cable (double-run "shotgun" cable)

Construisez vos câbles quasi-symétriques
Les câbles de modulations symétriques utilisent deux fils conducteurs regroupée dans un même câble blindé. Pour une liaison quasi-symétrique, un fil transporte le signal et est relié au point chaud, l'autre fourni la masse du signal et est relié directement à la masse de la prise, le blindage est aussi relié à la masse de la prise mais à travers une résistance de faible valeur qui ne réduit pas l'efficacité du blindage mais rend l'impédance du blindage une centaine de fois plus élevé que celle du fil de masse. Cela garanti que les courant du signal circule a 99.9 % sur les deux fils protégé. Les câble pour micro de scène sont particulièrement bien adaptés, leur impédance nominale et 300 ou 600 Ohms n'a pas d'influence sur notre construction. Bien entendu li faut acheter des prises acceptant le diamètre plus important de ce câble, leur corps plus volumineux permettra de contenir un peu plus facilement la résistance.
Soudez la tresse de blindage à la résistance de 1 ou 2.2 Ohms 1/8 Watt (la plus petite paille que vous trouvez), entourez celle ci d'un petit bout de gaine isolante thermorétractable. Soudez la résistance puis les deux conducteurs internes sur la prise et faite de même à l'autre extrémité. Pour réaliser un cordon stéréo vous devez construire deux câbles identiques, vous pouvez éventuellement regrouper les deux câbles avec une gaine thermos rétractable de grande taille et renforcer les extrémités de la gaine avec plusieurs tours de chatterton ou des "serre-flex"
 
A grounding wire is not needed but I suspect it could make as much difference as using shielded speaker wire (the difference is quite noticable).
I have tried many different Bi-wiring and Bi-amping configuration's over the past 12 year's, with multiple type's of cable, i.e. bare wire, "tinned" wire (coated in a thin layer of solder)(bare & "tinned" wire only where possible), properly crimped spade's, properly crimped banana's, silver soldered spade's, silver soldered banana's.
If you can afford some quality spade lug's and audio grade LEAD FREE silver solder (these are not so cheap) I would suggest you make yourself up a double run of cable, each identical in length, and silver solder the spade's onto the wire's. At the amp end solder two wire's, two positive's & two negative's, into each spade. You will need 6 spade's per cable and the corresponding amount of silver solder. If you are Bi-amping, or using A & B speaker output's, you will need 8 spade's per speaker.



Better for cheaper is easy in my opinion. I had a 13ft pair of Tara Labs Prism Bi-wire cable set up for single run. I paid $180 for the pair 7 years ago. Last month I bought a 100ft. roll of CL rated XPHP from Best Buy (click on link below). I ran a single cable of this stuff to my surrounds and a double run to each of my main speakers and center channel speaker. Of course I used Monster Banana Jacks and Flexi-Pins too. The double run of this cable to my main speakers blew away my $180 Tara Labs Prism Bi-wire. I couldn't believe it! What a difference. Even my wife who doesn't have an audiophile ear could tell a BIG difference. This compact In-wall/Out-of-wall design employs nearly all of the significant technology of the more expensive Monster Cable. I'd bet a double run (i.e. a single cable for ea. "+" and "-") to each Main speaker,of this stuff, would blow your M1.2 away! As for actually bi-wiring your speakers, I think using a double run of speaker cable to each speaker would do just as fine a job as actually bi-wiring them. For $129 for the wire and maybe $100 for 5 sets of jacks you can't go wrong. Oh yea, it'll take you 30 minutes per cable to install the banana jacks to the cable carefully








Jean-Luc Dumont
France
Local time: 21:33
Works in field
Native speaker of: French
PRO pts in category: 65
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