Sumiko Flux Buster Demagnetizer

With LOMC you certainly have to be careful and know how n advance your doing it in a way that won’t do damage. With a SUT, it’s mental masturbation; SUTs don’t become magnetized.

OP hears a positive experience,  but it goes against generally accepted audio law.

Responses reinforce why. 

Yup, sounds about right.

It’s not “audio law” at all. It’s physics of the metals used to build SUT cores. I forgot to mention that I personally prefer to demagnetize LOMCs using a test LP, which I don’t think can damage the cartridge magnets. Cardas test LP, for one example. I see that I and the OP both use the Cardas LP. It also gives the suspension a nice workout before it plays music. Therefore I cannot separate the demag effect from the exercise effect, but there is a benefit.

@lewm , can you please explain how you demagnetize a cartridge with a test record?

Good question.  I have no idea how it works.  But Stan Ricker says his LP demagnetizes  on (as I recall) cuts 2a, b, and c on side A.  I am guilty of believing Stan Ricker.  I have wondered how it would work, but not as much as I wonder about other things that occupy my time, like how Einstein's concept of the gravitational force compares to Newton's. Ergo, I have not investigated Ricker's rationale. I do know that the cuts contain rapid excursions of frequency, from low to high, repeated in succession. And cartridges that have been out of use for a week or more definitely benefit, but that could be as much due to exercising the suspension as from any demag effect.