Furutech Disc Demagnetizer

Disc Demagnetizer

Disc Magnetization Is No Mystery
The silk-screened label on an optical disc contains chemical compounds such as iron, nickel, and cobalt. These materials are all strongly magnetic and easy to remagnetize. The reflective information-bearing surface of optical media contains 99% aluminum, but 1% of these same highly magnetic materials! Even aluminum is a weak magnetic material.
Amazingly, optical discs actually become magnetized as they play! A magnetic field is induced as the disc spins in the player. In fact, demagnetization was routinely carried out by disc manufacturers everywhere. Because of tight, ultra-competitive pricing, most manufacturers now skip this important step.
op performance can only be achieved by demagnetizing before recording.
Other so-called demagnetizers on the market -- head erasers, bulk erasers, demagnetizing bars, “rotary” demagnetizers -- don’t actually demagnetize your discs. Some of them actually induce magnetism! For example, when a disc stops spinning in a rotary demagnetizer, some part of the CD is over a fixed magnet that once again magnetizes it.
Because Furutech’s RD-2 Ring Magnet technology ramps the power up then down again, the RD-2 is ideal for removing magnetic field buildup from cables, connectors, and power cords! (See illustration below.) No part of the playback chain should be influenced by resolution-sapping magnetic interference.
As you will see by examining the graphs below, untreated magnetic fields have a direct effect on data retrieval. These errors are easily perceived with today’s high resolution systems.
The RD-2 effectively reduces misreads while lowering the noise floor.

Disc Demagnetizer