If a CD disc were so perfectly engineered, that there was not a single microscopic scrap of magnetic material anywhere in its formation, I suspect that the demag would not help. That being said, I know for a fact that you CAN hear the effects of the bulk eraser and/or the other products listed above. I think the best way to answer the question is to remain open minded and try it. I did, and there is an improvement in following the demag process. It should not be hard to imagine that microscopic particles of material could be imbedded in the substrate of a CD. After all, there are no claims of 6-9's purity of the materials used in the pressing process!
Using a demagnitizer on compact Discs?
Does anyone use a "bulk" demagnetizer (like one uses to demagnetize a video tape or cassette tape)on compact discs just before playing them? Does it improve the sound of the CD? Can you describe how the sound is improved? Is the improvement signficant to you? Does the improvement warrant the cost of the demagnetizer and the time and effort to demagnetize a CD everytime you play it? I do not understand how a demagnetizer can have an effect on a compact disc (which is not magnetic) but I have been told it DOES have an effect. Thanks for your indulgence.