Audio Project Amplifier Speaker Loudspeaker Kit
diyAudio.com diyAudio Forums Archive > Top > Other Stuff > Everything Else
 
CD demagnetizers?!? - Click HERE for Original Thread
DragonMaster
A CD demagnetizer, let me laugh!

http://www.gcaudio.com/cgi-bin/stor...duct.cgi?id=190

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

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

I misread the paragraph:
quote:
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
quote:

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

That's the other kind of thing Furutech builds.
richie00boy
quote:
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
quote:
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
quote:
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
quote:

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! :idea: Building a cheaper alternative to the Furutech demagnetizer :$: :$: :$: )

Joking! It _would_ work btw.
dnsey
quote:
the only metallic part in a CD is aluminium and it's not magnetic.
IIRC, they claim that the ink with which the label is printed can be magnetised. Highly unlikely IMO - just passing on the 'theory'.
analog_sa
quote:
Building a cheaper alternative to the Furutech demagnetizer


Not long ago there was a post at this site describing a diy demagnetiser. Apparently the device costs very little to build and works well according to the poster. Predictably it generated only smart-*** replies.
djQUAN
try to count how many times the name of the company and the device model is mentioned in the page.
monomonster
are these people for real??? I would be happy to buy two copies of some cd and leave one in the package and "magnetize" the other with some huge neodymium magnets and have the inventor/s repeat a blind hearing test for 10 times. if they will be able to tell which cd sounds less good I will buy a unit like that for every person in the forum :cannotbe:

Page generated in 0.039910078048706 seconds with 17 queries,
spending 0.00913191 doing MySQL queries and 0.03077817 doing PHP things.

Powered by: Search Engine Indexer and vBulletin
Copyright ©1999-2008 diyAudio.com

Please support our sponsor.