I presume you have to run them that close together?(at the parallel section?) I would think a few inches more (apart)would be better. A good power conditioner might clean up things, if needed.
-
Our native mobile app has a new name: Fora Communities. Learn more.
Extra shielding?
Hi,
I've just had my electrician install speaker cables under the floor. I'm sanding them this weekend and don't have time to test the cables before the floors are sealed down. During the cable runs there are small parts (1 metre) where the cable runs parallel to an electrical cable although there is about 3-4 inches between them.
My question is, would it be beneficial to wrap them in tinfoil before sealing the floors down? I thought this might eliminate any RF interference. I'm also not sure whether this introduces capacitance/inductance problems so any advice much appreciated.
Cheers,
Stuart.
I've just had my electrician install speaker cables under the floor. I'm sanding them this weekend and don't have time to test the cables before the floors are sealed down. During the cable runs there are small parts (1 metre) where the cable runs parallel to an electrical cable although there is about 3-4 inches between them.
My question is, would it be beneficial to wrap them in tinfoil before sealing the floors down? I thought this might eliminate any RF interference. I'm also not sure whether this introduces capacitance/inductance problems so any advice much appreciated.
Cheers,
Stuart.
- Status
- Not open for further replies.
1 - 14 of 14 Posts
Yeah, because of where they are they need to run this close. How does a power conditioner help (I presume you mean on the sockets the electrical cable runs to)?
If it helps any the AV equipment is all on a separate circuit and it's this circuit that's running next to the speaker cables. There's obviously no transformers or dimmers on this circuit either.
Stu.
If it helps any the AV equipment is all on a separate circuit and it's this circuit that's running next to the speaker cables. There's obviously no transformers or dimmers on this circuit either.
Stu.
They're speaker cables, they feed a low impedance load. It's almost impossible for any audible noise to be induced into them.
what if they were video cables? Is there a way to add extra shielding to either the power line or the video line?
"Is there a way to add extra shielding to either the power line or the video line?"
Not really, unless you want to buy mumetal.
BTW, Coax cable is inherently sheilded.
Not really, unless you want to buy mumetal.
BTW, Coax cable is inherently sheilded.
A worthwhile experiment to confirm what tvtech1 has stated is to get yourself a length of extension cord and temporarily plug your amp or receiver into it. Then take the cord and coil it around or lay it flat, against either your speaker wires or video cables. So what did you notice?
Wrapping with tinfoil would be useless, even if you did have interference problems.
You might be better off to just space them apart by a few inches.
You might be better off to just space them apart by a few inches.
They're already a few inches apart so I'm hoping that's going to be ok. Looks like the general consensus is they'll be fine. Unfortunately I can't test them at all due to a number of reasons but the main one, I'm not living in the flat at the moment and I can't really spare the time to ship my AV gear. Also it's got lots of construction (think full of brick/wood/plaster dust) going on, not the best place for my amp!
Thanks for the help anyway, I was just wondering if anything needed done before I screwed the boards back down.
Stu.
Thanks for the help anyway, I was just wondering if anything needed done before I screwed the boards back down.
Stu.
As was stated, with speaker cables you'll be fine. However, if you weren't, wouldn't pvc pipe do the job well considering the copper wire in coax cable is surrounded by a jacket of pvc? It would cost you about a dollar.
Quote:
Plastic has no electromagnetic sheilding abilities.
| wouldn't pvc pipe do the job well considering the copper wire in coax cable is surrounded by a jacket of pvc? |
Then why do 75ohm cables have thick white plastic surrounding the copper?
Steve, the white plastic is the "dielectric", and it's what separates the center conductor from the shield. It's purpose is to maintain the distance between the center and the shield, which controls the cables impedance characteristics for RF use.
1 - 14 of 14 Posts
- Status
- Not open for further replies.
AVS Forum
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!
Full Forum Listing
Top Contributors this Month
View All
WilliamR
833 Replies
BASSAHOLIC
488 Replies
mrtickleuk
404 Replies
Recommended Communities
