[lacquer]

Hello all,


I just finished a dedicated HT room, and for the subwoofer I ran a 25' AR cable through the wall. Unfortunately, the drywall guys ruined one of the ends. So I cut off the plug expecting to find a single insulated wire in there, but there are two wires! Once small red one, and one small white one. Additionally, there is what looks to be a metal jacket around the outside, which I assume to be the magnetic shield.


How do I hook up an RCA plug to this? Perhaps the red or white is a grounding wire, even though it is insulated? Any help on my dilemma would be greatly appreciated.


Chris

 

[hometheaterguy]

The drywallers are notorious at rotozipping low volt cable. They are liable to repair it.

 

[lacquer]

They are liable, but I don't want to wait and I certainly do not want another mess. So I have to figure out how to save this cable somehow.....



Chris

 

[hometheaterguy]

You are running a low level shielded interconnect to your sub? Do you have a link for your cable and the model number?

 

[lacquer]

AR 25' subwoofer cable
http://us.st8.yimg.com/store1.yimg.c...1814_112128375


Follow this link it has all the specs:

AR 25' Subwoofer Cable


Thanks!

 

[BasementBob]

 http://www.araccessories.com/NR/rdon.../AP052_3LG.jpg

This page says
Quote:

Twisted pair construction with directional noise drain

As for what to do with the twisted wires, I'd have no idea. Perhaps you could give the company a call or very carefully take apart the existing end to see how it's wired inside.

Or you could try the Acoustic Research Contact Us page.

 

[TonyBDA]

Why don't you look and see which wires are connected at the other end?


"Twisted pair construction with directional noise drain"


Directional? Is the cable full of diodes?

 

[lacquer]

I tore apart the old plug. It looks like the red wire was connected to the center part of the RCA plug, while the white once was connected to the outside of the plug. But I cannot be certain.


If i put new plugs on both ends of the cable, could I just solder both wires to each end of the plug? I hope somebody has an answer.


Chris

 

[bpape]

As long as they're the same you should be fine. Red to center on both ends and white to outside on both ends. This does not appear to be a 'strange' cable that used 2 different guages of wire.


The directional shield will probably be attached to the outside but only at one end.

 

[hometheaterguy]

I am stumped on this one bud, sorry. If it could be confirmed the cable was 75OHM coaxial design I would make a clean cut at the damaged end and get a RCA fitting and crimp it on.

http://www.partsexpress.com/pe/showd...number=360-047


It looks as if soldering is your only way out in this case.

 

[Ratman]

If the cable is loose through the wall and now that both ends are cut, I'd try to use the old cable to pull new RG6 and terminate with RCA's.

 

[Wayne A. Pflughaupt]

lacquer,


As a guy with extensive experience making custom cables (and troubleshooting and repair of the same), I can tell you there is only one way to figure this out: You will have to use a VOM meter to “ring it out†– that is, do a continuity check see to see which wire(s) show up at the tip and at the barrel.


For instance, using the picture in BasementBob’s post as a reference, connect one probe of the meter to say, the red wire, and the other probe to the tip and then the barrel of the RCA, and see which one gets you a continuity tone.


Once you’ve figured out which wire goes where, you can solder on a new connector.


Whichever one you find goes to the barrel, tie in the shield wire to that one.


Regards,

Wayne A. Pflughaupt

 

[tvtech1]

Quote:

I can tell you there is only one way to figure this out:

So, unscrewing the barrel and actually looking at what wires are soldered where , like the original poster did, a few posts up, won't work?

 

[Ratman]

Only if the barrel is a 'screw on'... which is doubtful.

 

[tvtech1]

Quote:

Originally posted by Ratman Only if the barrel is a 'screw on'... which is doubtful.

That's the best you could do?

 

[lacquer]

The barrel was totally encapsulated in rubber, there was no way to open it except to go at it with wire cutters, which is what I did. It looks like a continuity tester is in my future unfortunately.....


Thanks to all who helped! If anybody else has any ideas, let me know!


Chris

 

[Ratman]

Quote:

Originally posted by tvtech1 That's the best you could do?

No need to try to be 'the best', as some attempt in futility.