Question In-Ear magnetic driver ?

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cloudff7ps1

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Sep 3, 2020
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In-Ears headphones use magnetic dynamic drivers. If you bring the in-ears close to an electronic device that releases magnetism with a 29" CRT TV (coils, speaker) turned on, will this TV cause demagnetization or permanent loss of performance of these in-ear drivers?
 
cloudff7ps1 said:
In-Ears headphones use magnetic dynamic drivers. If you bring the in-ears close to an electronic device that releases magnetism with a 29" CRT TV (coils, speaker) turned on, will this TV cause demagnetization or permanent loss of performance of these in-ear drivers?
Click to expand...
Seeing as we had headphones and other small speakers coexisting with CRTs for a loooong time, and nothing like that ever happened...
No.
 
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Are the magnets in in-ear headphones, such as the KZ EDX Pro and KZ EDC Pro, more resistant to demagnetization than hard drives near sources that generate magnetism, such as 29" CRTs?
 
What is the main explanation for a dual magnetic dynamic driver of the In-Ear KZ EDC Pro or KZ EDX Pro not being damaged and demagnetic if it is located very close to a few centimeters of a 29" CRT TV or 2.5" HDD turned on (both have magnets and coils)?
 
cloudff7ps1 said:
What is the main explanation for a dual magnetic dynamic driver of the In-Ear KZ EDC Pro or KZ EDX Pro not being damaged and demagnetic if it is located very close to a few centimeters of a 29" CRT TV or 2.5" HDD turned on (both have magnets and coils)?
Click to expand...
CRTs have very controlled magnetic fields. If they didn't the shadow mask (a think metallic part at the front of the CRT) would become magnetized. TVs do have a temporary magnetic field that is generated when the set is cold to demagnetize the shadow mask. That magnetic field lasts for a second or two.
 
Incidentally, the old style CRT tube displays can be demagnetized. I don't even know who would sell those demagnetizing coils ("degaussing coil"), but they used to be cheap and trivial to use. Not sure if anyone still sells them. The point is that even if a magnet does distort a CRT by being strong enough and present close enough and there long enough, then the problem is still reversible and not permanent.
 
but in the case of in-ears (for example EDX Pro and EDC Pro) they have magnets and I don't know what disturbances or conflicts between the magnetism of the 29" CRT TV and the HDDs x in-ear magnets are caused by them being very close
 
cloudff7ps1 said:
but in the case of in-ears (for example EDX Pro and EDC Pro) they have magnets and I don't know what disturbances or conflicts between the magnetism of the 29" CRT TV and the HDDs x in-ear magnets are caused by them being very close
Click to expand...
The vast majority of "speakers", be they tiny in-ear things, or giant subwoofers....rely on a magnet.

Have you read any report of these devices becoming "unmagnetised" by being in proximity to a CRT?
If you have, please post the link.

Otherwise, this is unsupported speculation and FUD.
 
Dynamic drivers use a voice coil and a permanent magnet (nearly always neodymium), neither of which are easily permanently affected by even very strong magnetic fields unless the manufacturer was dumb enough to use a ferrous wire instead of copper.

Changing magnetic fields may not easily be shielded against but can be redirected with metal into eddy currents that oppose the original magnetic field, which is why those tiny speakers inside CRT TVs generally had a steel can shield over the magnet. This of course only helps in between the two fields and on the other side of the metal you still get a slightly attenuated magnetic field only in the opposite direction from the original one. So either many layers of laminated iron/steel (to break up the eddy currents) or ferrite (which has high resistivity) would help in other directions.

As aluminum or tin are very much less effective than steel for this, if you wanted to make a tinfoil hat it would have to be made of many more layers to be effective than if you used stainless steel foil.
 
So is it safe to store In-Ears headphones (dual magnetic dynamic drivers) very close to a 29" CRT TV and HDD for a long time without the risk of demagnetizing the IEM drivers?
 
cloudff7ps1 said:
So is it safe to store In-Ears headphones (dual magnetic dynamic drivers) very close to a 29" CRT TV and HDD for a long time without the risk of demagnetizing the IEM drivers?
Click to expand...
Define "very close".

If you were to open the CRT case apart, and tape the earbuds to the mag coil, and turn the CRT on...then no.
But I'm expecting you're not going to do that.

So...yes. It is 'safe'.
 
cloudff7ps1 said:
distance a few centimeters from the In-Ears headphones KZ EDC Pro and KZ EDX Pro to the 29" CRT TV and the HDDs turn on
Click to expand...
Mag field strength falls off as the inverse cube law.
(No, I shall not explain that to you. Google is your friend)

Again, since this has not been a reportable thing in the history of ever....you are expending brain bandwidth on an issue that is a non-issue.
 
What material is used in the eartips of the KZ EDX Pro and KZ EDC Pro? Eartips stored for many years undergo chemical reactions, melt and stick to the body of the iem?
 
Even if you could contact KZ it's not like you could speak with their engineer. And it's not like their engineer would know what toxic waste that production made them out of back then, when for $4.49/pr shipped on Alibaba it means they just use whatever toxic phthalate-filled recycled material is cheapest that day.

If you are really curious to see if they contain any silicone at all, just burn them with a torch. Silicone rubber degrades to a white powder.
 
@cloudff7ps1

There are soft plastics that can and do melt when in contact with each other.

E.g., plastisol, Elaztech - and others.

Common problem with soft fishing lures/baits. Between lures/baits and some storage boxes.

I have seen that happen with other plastic items as well. Some that do not melt just get sticky...

If you must store plastics for long periods of time then you may be able use some of the ideas and methods used by fishermen.

https://www.saltstrong.com/articles/storing-soft-plastic-fishing-lures-correctly/

However (full disclosure); I do not have too much of a problem with storing plastic baits etc. in boxes. Most of my plastic lures end up stored in trees, rocks, lily pads, underwater logs, and so forth. :)

Those baits that have yet to meet that fate are carefully kept separated as discussed in the link above.
 
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