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Go Back   Head-Fi: Covering Headphones, Earphones and Portable Audio > Equipment Forums > Cables, Power, Tweaks, Speakers, Accessories (DBT-Free Forum)

Cables, Power, Tweaks, Speakers, Accessories (DBT-Free Forum) Discussion of cables, power (the electric kind), tweaks, & accessories.
I, Objectivist:  The Objectivist Audio Forum (opening soon) If you feel the uncontrollable urge to use the word "placebo," in here is where you'll post (and only here). Discuss DBT all you want in here.

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Old 02-06-2008, 05:23 PM   #281 (permalink)
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Awesome! The Wiki article was marked for deletion!!
....
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Old 02-06-2008, 05:26 PM   #282 (permalink)
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Quote:
Originally Posted by Acoustic Chef View Post
Now that the water's calm, you have any questions about our cables and their designs, feel free.
Stand by the phone and hold your breath. Go ahead... keep holding it...

<door slam>

<muffled trailing off into the distance>

...keep holding it... keep...
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Old 02-06-2008, 06:02 PM   #283 (permalink)
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Ok. I will.

Actually, I think thats what the foil might be doing. Just like the magnets on the cable are supposed to create a field that accelerates the electron flow, I believe the following could be happening:

1) By wrapping the foil from magnet to magnet, it is widening the field somehow and accelerating the electron flow even further.

More likely:
2) By wrapping the foil from magnet to magnet, the stray EMI all around the cables are gathering in a field around the cable, accelerating the electron flow via magnetic induction. (There was a recent article in Popular Science about Wireless electricity using magnetic induction at a given frequency.) If this is the case, depending on the levels of EMI floating around you might experience variable results during your listening session.

The workaround for future generations of cable:
If in fact #2 of the above is what's happening, it would make sense why a certain cable company has power supplies attached to their cables. This would provide the benefit of the foil without the EMI uncertainty factor.
Try Google Faraday Cage, and EMI ferrite. Aluminum foil are non-magnetic. So what you have constructed is a Faraday cage. However for a Farady cage to operate properly, the shield needed to be grounded.
The magnet used on the cable is to reduce emission. It is also used in some power supply cable to reduce emission from the switching power supply. These are part of the FCC requirement.

One of the great test for RFI/EMI is to use your cell phone. Just call someone and the put your phone along the cable, connectors and equipment. The interference will sound like a noise, not reduced high or low. It is very distinctive. If you don't hear anything different, then you don't have any problem.
You can do the same test with cheap powered PC speaker. You can definitely hear a noise coming through.
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Old 02-06-2008, 06:10 PM   #284 (permalink)
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Quote:
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Try Google Faraday Cage, and EMI ferrite. Aluminum foil are non-magnetic. So what you have constructed is a Faraday cage. However for a Farady cage to operate properly, the shield needed to be grounded.
The magnet used on the cable is to reduce emission. It is also used in some power supply cable to reduce emission from the switching power supply. These are part of the FCC requirement.

One of the great test for RFI/EMI is to use your cell phone. Just call someone and the put your phone along the cable, connectors and equipment. The interference will sound like a noise, not reduced high or low. It is very distinctive. If you don't hear anything different, then you don't have any problem.
You can do the same test with cheap powered PC speaker. You can definitely hear a noise coming through.
Very cool. Thanks. I will try some of those tests.
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Old 02-06-2008, 07:08 PM   #285 (permalink)
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I would maybe consider 16/14AWG for my main speakers.
Not to derail the thread, but for speakers, even the cheap Insignias that I run I would recommend a minimum of 12 Gauge, but personally run 10 gauge. You can find Beldon 5000UE (12 gauge) for 58 cents a foot, or 5T00UP (10 gauge) for 85 cents a foot. At those prices why skimp
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Old 02-06-2008, 07:12 PM   #286 (permalink)
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Monoprice has even better prices. I just bought a 100ft spool 12 gauge speaker wire, cost me $24, but you have to terminate them yourself though.


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Not to derail the thread, but for speakers, even the cheap Insignias that I run I would recommend a minimum of 12 Gauge, but personally run 10 gauge. You can find Beldon 5000UE (12 gauge) for 58 cents a foot, or 5T00UP (10 gauge) for 85 cents a foot. At those prices why skimp
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Old 02-06-2008, 07:13 PM   #287 (permalink)
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ecclesand, perhaps you don't come often enough to this forum to see how it's degenerated. There were never any issues in here before a certain cadre of malcontents made it their home away from home. The gloves came off in here ages ago, sorry to say. Reminding you that "they started it" may seem a weak defense, but there it is. There can be no doubt from any imaprtial readers of these forums, which camp is the more aggressive, more negative, and more insulting than the other. I decided a while back to start responding in kind so they can (maybe) start to see what they themselves are doing in here, maybe "shock the conscience" (if they have one) so to speak.

That one silly insult is *nothing* in my book compared to constantly having your reputation/honor/trustworthiness, built up over years and years of being active in the community becaoming a fairly trusted source for good information, be trashed by a few trolls-come-lately who know a lot less than they think they do, and have more time than knowledge.

As for Mr. Akathisia, in discussing things off-line, we have agreed that sometimes what you type and what you mean can be two different things as well as what was typed and was read. I think we're cool now, but I'll speak for myself.

Last edited by markl : 02-06-2008 at 07:18 PM.
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Old 02-06-2008, 07:18 PM   #288 (permalink)
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Monoprice has even better prices. I just bought a 100ft spool 12 gauge speaker wire, cost me $24, but you have to terminate them yourself though.
Yea they have great deals, as for termination just keep them raw (yet another thread that would cause much debate)
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Old 02-06-2008, 07:21 PM   #289 (permalink)
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As for Mr. Akathisia, in discussing things off-line, we have agreed that sometimes what you type and what you mean can be two different things as well as what was typed and was read. I think we're cool now, but I'll speak for myself.
No hard feelings between markl and I. We took the discussion out of this thread, and away from public view, as Wmcmanus requested. I think everyone else should heed our mods words, or this thread will get closed.
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Old 02-06-2008, 07:23 PM   #290 (permalink)
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Actually that's just what I was thinking. Even though I bought 2 pairs of banana plugs along with the speaker wires, if it turns out to be too much of a hassle to terminate the wires, I may just end up keeping those wires naked.


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Yea they have great deals, as for termination just keep them raw (yet another thread that would cause much debate)
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