Is this for real?

it works. Have the XLO disk.

My friend Joe in Tennesee said his top of the line Denon/ Paradigm Reference 100 home theater was lackluster in sound and " missing something" As I was on my way down, I said I would bring something that might help him out. I took my Sheffield Labs MDMS system conditioning and degaussing cd. After initial listening, we popped in the cd and left the room as the " magnetic domain matrix signals "did their job on the system and not our ears. Afterwards, he was amazed at the results, which were basically a cleaned up,i.e. more detail out of blacker less muddy background livelier as a result sound. He wanted one immediately and I referred him to Music Direct as they have a degaussing cd for $20 or so,and I haven't seen a Sheffield for sale for a number of years. I run it on my system every week or so and have always found it to be beneficial, to the point where I find myself thinking " Ok, something is wrong here. Oh yeah, get the cd." $100? If mine breaks and there isn't something available that's effective for $25 or so, I would do it. Don't know why or how it works. The vinyl version works as well, in my opinion. Have fun.- Gary

I also have the XLO disc and it has been stored without any use for the last few years. After seeing this thread I sought it out and put the system through the test tones, etc. After using the so-called demagnetizing sweeps I put on a CD and low and behold the highs were clear and precise. I recently thought I might need an EQ to fine tune them and bring them out more but now I don't think I do. Sounds really improved. It will stay out front and in regular use. I was sceptical also and just forgot I had it. Thanks for the post.

Is an engineer out there somewhere who could explain just how a test tone can "demagnatize" copper? If the explaination is feasable I would be a believer.

The disc I have suggests that there is a build-up of residual magnetism within cables, circuit boards and copper wiring. That magnetism may also be present in spades, other connectors or solder for that matter; who knows? Sam Tellig, in a review of the Densen disc, suggested that excellent results were obtained with single ended tube gear, possibly as a result of demagnetizing the transformers. I don't know how it works and I don't really care. There will be a thousand engineers tell me that a power cord can't make a difference and I know that to be false. The fact is that the sweep tone tends to "clean things up" for lack of a better description. It is particularly noticeable, as Ljij suggests above, when it has not been used for some time. The effects are more subtle when using the sweep tone regularly (the disc I have suggests after every 30 hours of play-I use it about once a week), but they are indeed there. I don't need an engineer for that, and at $20 or so, this is not an outrageously expensive tweak. If it doesn't work for you, you're out $20. Bob Bundus alluded to this in a tweak thread a couple of weeks ago: if you don't have experience with something, why ridicule it? Obviously, from the way this thread has moved on, it is working for some people.