Demagnetization

Posted by: Eric Barry on 27 March 2001

At the risk of losing my flat earth points, I used the demagnetization track on the Cardas Sweeper lp last night, and it made a huge difference to my ears. I hope I'm not hearing things (actually, all that matters is that I'm happier with the sound).

The Cardas record just uses a simple frequency sweep from 30 to 30khz. Are there cds that do the same? Has anyone used them? Are any of them reasonably priced?

--Eric

Posted on: 28 March 2001 by Tony L
quote:
At the risk of losing my flat earth points, I used the demagnetization track on the Cardas Sweeper lp last night, and it made a huge difference to my ears. I hope I'm not hearing things (actually, all that matters is that I'm happier with the sound).

Demagnetism ain't exclusively round earth - I have the Densen Demag CD and Densen are well flat earth. I really rate the CD, I use it every couple of weeks, and things definitely sound a little clearer and better defined afterwards.

It seems especially effective with old kit that has been in use for years. The first time I used it on my system (my amp and speakers are both pretty old) I noticed a really beneficial change, use afterwards just tops it back up to this point.

Tony.

Posted on: 28 March 2001 by Chris Brandon
Where can I buy one of the Demag cd's ? (and how much ?)

Regards

Chris

Posted on: 28 March 2001 by Chris Brandon
Thanks Paul..


...guess what my next purchase is going to be ? !!! smile

Regards

Chris

Posted on: 28 March 2001 by david skinner
Has anyone out there tried a demag using an audio cassette deck and a demagnetising cassette? Might be a cheap solution.Although not operating on the whole replay chain ie. CD or cartridge, there may be some benefit. Try running the demag tape with the deck playing thru the system at a low volume setting(no responsibility taken for blown tweets!).

David

Posted on: 28 March 2001 by Nigel Cavendish
I have a Densen deMagic CD which worked well on my Marantz 63SE but does not seem to do anything to the CD 3.5, but that is an aside really.

I once tried to record the deMagic CD onto tape - it drove the tape deck bananas. The LCD record level display went off the scale, no matter what I did to the record level control, and even after I had ceased recording the tape deck would not respond to any of its controls. In the end I had to unplug it from the wall and then plug it in again to bring it back to normal.

cheers

Nigel

Posted on: 28 March 2001 by Chris Brandon
Frank,

Thanks for the link,Followed it and found that the Audio Counsel is one of their distributers (even though the listed contact phone number is not the correct one).

Happily,I work reasonably close to their Oldham branch,so,one phone call and a car journey later,I have one !

I had to try it out in my car on my way back to work,playing the 3 minute track at the suggested normal volumes managed to give me a proper good headache !....so,be careful !

Regards

Chris

Posted on: 28 March 2001 by Tony Storey
Chesky also do a comprehensive test disc which includes two demagnetising tracks that work well. One is a frequency sweep and the other is low frequency fade - can't remember at what frequency although 440 hz comes to mind.
Posted on: 28 March 2001 by Chris Brandon
Ok,

According to the supplied literature,

"the DeMagic cleans the entire signal path of magnetism which has built up during playback due to DC leakage and other influences on all the parts used in the audio components"

So,does this mean literally everything in the playback chain,from cd transort,dac,pre,power,speakers,and all associated cables ?

Regards

Chris

p.s. ...Yes it did seem to work ! - more clarity etc,but,will give it a more thorough evaluation later

Posted on: 28 March 2001 by Chris Brandon
Ok sat down to the "de-mag'd" system for quick impression session...

There was deffinatly a precevable improvement in the areas mentioned,clarity and defenition.

Could another theory on its operation be that due to the fact that,during the procedure,there seems to be quite a bit wideband acivity in the system,the kit ends up getting an intense 3 minute warmup ?.....(or is this just the sceptical side of my nature rearing it's ugly head ?)....comments anyone ?

I decided to wander round to Any H's eight doors away,the results were comparable with my own findings.

I would still value any comments as to the effect on the "whole signal chain",as opposed to just the cd unit.

I have always had a "need to know how things work"mentality about me
smile

Regards

Chris

[This message was edited by Chris Brandon on WEDNESDAY 28 March 2001 at 20:31.]

Posted on: 28 March 2001 by Martin Payne
Chris,

some years ago there was an article in one of the hi-fi rags that systems often sounded better after a thrashing with a particular 'Tage Against the Machine' track, which had very powerful treble.

There was some suggestion that this gave the tweeter a thorough 'workout' and freed it up.

I borrowed the Densen CD from my dealer recently - must try it and return it ASAP. Will post my results here.

cheers, Martin

Posted on: 30 March 2001 by Chris Brandon
The more I play around with this,the more I seem to be leaning towards the "intense 3 minute workout" theory.

There may well be a beneficial effect of the "demag" action,(and,who am I to argue with Densen's claims ?) as my system did seem marginally better than normal a couple of days after it's first use,but the effect of repeating it's use and playing a cd immediatly after use seems to me to have more of an impact than merely using it to demagnetise the signal path.

But,in one respect,it deffinatly seems to work.

Is there any one from Densen looking in ? (I very much suspect the answer is yes...)

If so,PLEASE could you put me out of my misery and explain how it works,and in your opinion,how to use it for the best results....please ?

Regards

Chris