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geoffkait
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What's the deal with CD demagnetizers?

OK, I've got an innocent question for anyone. How do CD demagnetizers world. I'm a little dissatisfied with reviewers' or anyone's ubiquitous comment, "I have no idea how it works but works it does." Whether it's the Radio Shack bulk tape eraser, the Walker Audio Talisman, or another demagnetizer, pretty sure Furutech sells them too. So, anyway, we all know that demagnetizing CD prior to play does improve the sound. If you haven't tried it trust me it works. But the closer you look at this phenomenon the more mysterious it becomes. The main question I have is even if there is some magnetic materials (impurities) in the CD, you know, in the ink used for the CD label graphics or in the metal layer, surely the magnetic field arising there from must certainly be very very small, given that the ferrous impurities would by necessity be perhaps what less than 0.001 of the material? But for the sake of argument let's say there is SOME (extremely minor magnetism) in the material of the CD, the ink and/or the metal layer, why would that mag field hurt the sound and by the same token why would demagnetizing the CD improve the sound? One assumes the magnetic field builds back up over time since the demagnetizers must be employed on the CD every so often. Even assuming some small magnetic field, any magnetic field, associated with the CD how would that affect the sound one way or the other? And if the magnetic field, whether tiny or maybe not so tiny, is too have any affect on the CD laser beam itself, perhaps changing it's course, it had better do it rather quickly as the photons are moving at light speed. But maybe this is wrong, that the filed is not affecting the laser but something else.

Anyone have any insights? Share, share.

Geoff Kait
Machina Dynamica

May Belt
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Sharing

>>> “Anyone have any insights ? Share, share.” <<<

Geoff, starting with applying a demagnetiser to a vinyl disc I will repeat the concept I put forward a few years back, during the extended (and heated) discussion following Michael Fremer’s somewhat controversial article describing his experiences after applying a demagnetiser to vinyl discs.

I extended the concept that it is us (human beings) who are doing the reacting – reacting to the differences between a demagnetised vinyl disc and an untreated vinyl disc. That we (human beings) could be reacting adversely to certain polarisations created on the disc/s after many repeated playing of the disc and that we react less adversely after a demagnetiser had been applied to the disc/s – therefore being able to resolve far more of the available information on the disc/s.

Regards,
May Belt,
PWB Electronics.

geoffkait
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Actually, now that you remind me, there are many apps

Yes, when I had a vinyl rig, and what a rig it was, I used a demagnetizer on records, with the Radio Shack bulk tape eraser one had to take care to pull the eraser away from the record to some distance prior to releasing the power button otherwise the magnetic field might otherwise be placed back on the just demagnetized record. One assumes this procedure also applies to "passive" devices such as the Walker Talisman, which I understand has rows of neodymium magnets at offset angles, but I haven't opened one up to confirm this as they're a little expensive. ;-). Other things I routinely demagnetize include the magnetic tape head on my Sony and Aiwa and other portable cassette players, the leads on my lightweight Sony heasphones, the portable CD player unit which can be demagnetized as a whole using a few sweeps of the Talisman. Prior to going all portable, back when I had my tube headphone amp and Sennheiser headphone set up I found using the Talisman on RCA jacks, the magnetic screws of the amp, interconnects and internal wiring of the (open) modded Oppo to be beneficial. Some of these demagnetizer applications are easier to explain than others, I'm afraid. :-).

Geoff Kait
Machina Dynamica

geoffkait
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Cathy Roberson wrote:
Cathy Roberson wrote:

There are many ways to demagnetize a something("a magnet i hope"). You can do that by tapping,heating,dropping it from a height,hammering etc.

That might very well be true. But I think I'll stick to my trusty Walker Talisman and forego heating, dropping from a height or hammering my CD player, my CDs and my vinyl (assuming I had any). It's much more forgiving. :-)

Geoff Kait
Machina Dramatica

geoffkait
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Whilst demagnetizing your

Whilst demagnetizing your audio tape player, which I do myself for my portable Sony Walkman cassette player from time to time as well as clean the tape head with a Q tip and alcohol, make sure you have no cassettes in the vicinity that might be adversely affected by the demagnetized. I use a Walker Talisonman but any demagnetized will do. If you use an electronic demagnetizing turn the thing ON away from the tape player then pass the demag over the tape head several times. Take the demag away from the player before turning the thing OFF otherwise you can inadvertently place a magnetic charge back on the tape head. Don't worry about demagnetizing anything else besides the tape head.

Stephe_Caldwell
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CD

I have read that shack bulk tape erasers are having a positive effect when it is used on cds, does anyone try this before?

geoffkait
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Stephe_Caldwell wrote:
Stephe_Caldwell wrote:

I have read that shack bulk tape erasers are having a positive effect when it is used on cds, does anyone try this before?

Yes, I used a Radio Shack bulk tape eraser for many years on CDs and interconnects with positive results.

G. K.
Machination Dynamica

geoffkait
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alvarezjudy wrote:
alvarezjudy wrote:

Frankly speaking, I had no idea how do CD demagnetizers world until your questions. As I`m working as a freelance paper writer here and usually read a lot to write a research paper, I decided to investigate this problem. I found out that there are really many ways to demagnetize something. For example, you can easily do it by tapping, heating, hammering. Anyway, you can visit this site https://www.smartpaperhelp.com/ and get all the answers.

Thanks for posting. While you're investigating magnetization how about investigating how any method of demagnetization can have an effect on a CD which ostensibly has no magnetizable parts. Furthermore how about investigating why demagnetizing a CD would change the sound even if the CD contained magnetizable elements. Thanks in advance.

Banjamin701
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Frankly speaking, I had no

Frankly speaking, I had no idea how to do CD demagnetizers world until your questions. As I`m working as a freelance, and I usually respond to students' requests to "do my homework for me." I have been working as an essay author for more than a year and I am very pleased with this work. The further, the more I develop as an independent author, which can play a good role in my further development. By how much I dream of writing my book, written practice in many ways helps me and it only brings me closer to my goal. I know that writing skills are very difficult to develop, but I'm not going to stop there!

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My 2c

I own an Acoustic Revive RD-3 demagnetizer. According to Acoustic Revive, ferrous materials used for the printable surface of the disk and ferromagnetic content in the aluminium recording layer, together with magnetic materials used in cd players contribute to cd's becoming magnetized. Using a demag device like the RD-3 just allows the laser to follow the disc a bit more accurately. To my ears, there is a slight improvement up to a quite dramatic improvement combined with the RIO-5II. Acoustic Revive gear just seems to improve naturalness.

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