CD demagnetizers?!?

[DragonMaster]

A CD demagnetizer, let me laugh!

http://www.gcaudio.com/cgi-bin/store...uct.cgi?id=190

They say the CD magnetization comes from the cables and connectors.

[xplod1236]

They should make one of those for tapes.

I wonder how they would market it.

Tape demagnetizer (aka tape eraser)?

[richie00boy]

I can't see where it makes reference to cables causing thr magetisiation.

I offer them £1,000,000 if they can magnetise any one of my CDs though. And a further £1,000,000 if they can then demagnetise it with one of those machines.

[DragonMaster]

I can't see where it makes reference to cables causing thr magetisiation.

I misread the paragraph:

Interestingly, Furutech suggests that the various connectors and cables in a system will benefit from demagnetization. According to Furutech supplied information, magnetism is generated in these parts by the current flowing through them.

I forgot to read the first sentence.

[wes-ninja250]

Wow, Six Moons reviewed it without debunking it.

I guess that means it's credible, right?

Better run and buy some $500/ft speaker cables....

Wes

[DragonMaster]

Better run and buy some $500/ft speaker cables....

That's the other kind of thing Furutech builds.

[richie00boy]

Interestingly, Furutech suggests that the various connectors and cables in a system will benefit from demagnetization. According to Furutech supplied information, magnetism is generated in these parts by the current flowing through them.

Typical skewing physical phenomenon to trick people. Yes, a magnetic field will be generated by the electric current flowing, but as soon as the current stops it will pretty much immediately disappear. Copper is not magnetic.

And about the demagnetising, unless the demagnetising system can determine which polarity the unwanted magetisation it is, it's useless and may even cause further magnetisation.

[philipbarrett]

Originally posted by richie00boy


Yes, a magnetic field will be generated by the electric current flowing, but as soon as the current stops it will pretty much immediately disappear.

...and when that stops being true I have some loudspeakers to sell y'all

[Steve Eddy]

Originally posted by richie00boy
And about the demagnetising, unless the demagnetising system can determine which polarity the unwanted magetisation it is, it's useless and may even cause further magnetisation.

Doesn't need to determine that and if done right won't cause any further magnetization.

Just need to produce a strong AC magnetic field which gradually decreases over time. The AC field will flip the magnetic domains back and forth and as it decreases, they'll "stick" in random polarities.

se

[DragonMaster]

Just need to produce a strong AC magnetic field which gradually decreases over time. The AC field will flip the magnetic domains back and forth and as it decreases, they'll "stick" in random polarities.

That's how tape head demagnetizers work.

Anyways, the only metallic part in a CD is aluminium and it's not magnetic.

I think it costs 350$ because of the giant core it needs(If it's really a demagnetizer). Using a motor to spin the CD slowly would have reduced the cost a lot. (It's giving me some ideas! Building a cheaper alternative to the Furutech demagnetizer )

Joking! It _would_ work btw.