About the magnetization of iron-cored MC cartridges

When an iron-cored MC cartridge is used for a long time, the "winding frame of magnetic material" that is placed in the magnetic circuit formed by the yoke and magnet and wound with the coil becomes magnetized.

Effect of Demagnetization

Demagnetization of the MC cartridge can be achieved by short-circuiting the MC cartridge during record playback. For example, a cartridge with an impedance of 4Ω and an output voltage of 0.3mV will have a demagnetization current of 0.075mA. Similarly, a cartridge with an impedance of 40Ω and an output voltage of 0.3mV will have a demagnetization current of 0.0075mA. The degausser: DG-100 has a demagnetizing current about 50 times greater than that of the DG-100, doubling the demagnetizing effect. The effect is an increase in resolution at the microscopic level and a better sound with better separation. MC step-up transformers can also be demagnetized.

Caution

For air-core MC cartridges and optical cartridges, there is no effect of demagnetization because there is no magnetic material that wraps the coils.

When demagnetizing MM or MI type cartridges, be sure to remove the needle tip. If the needle tip cannot be removed, do not use it. The magnet will be demagnetized.

When demagnetizing an MC step-up transformer, disconnect it from the PHONO/preamp, etc. before demagnetizing the transformer alone. Loud noise may damage the speakers.

Do not force RCA plugs with a tight fit. It may break the RCA jacks on the main unit.

Notice

EA350/550 Demagnetizing the built-in MC transformer: When the power is off, connect it to the INPUT2 and RCA jacks on the rear panel and demagnetize it.

EA-500 Demagnetizing the built-in MC step-up transformer: When the power is off, connect the transformer to the MC, INPUTI, and RCA terminals on the rear panel and demagnetize it.

Demagnetize the EA-1000 built-in MC step-up transformer: When the power is on, set the input switching (INPUT) to MC2 and the impedance switching (MC IMPEDANCE) to HIGH on the front panel, and connect the transformer to the MC INPUT2 and RCA terminals on the rear panel. At this time, turn off the power of the connected preamplifier. Loud sound may damage the speakers.

CM-2000: Input switching (INPUT) on FRONT should be set to 1 and connected to INPUT1 and RCA terminals on the rear faceplate to demagnetize the unit.

Easy 3-step operation

Connect the "LINE OUT" of the unit to the RCA input terminals of the MC step-up transformer or the RCA plugs of the record player, turn on the power with the "POWER" button, and press the "START" button to complete demagnetization in about 20 seconds.

When to replace the batteries

When the light around the POWER button becomes dim, it is a sign that the battery capacity is running low. Replace the batteries as soon as possible.

Leaving a used battery unattended may cause leakage of liquid, resulting in equipment failure.

Product Specifications

Output oscillation frequency 440Hz±5

Output voltage 0.7Vrms or more

Output waveform Exponential decay waveform for about 20 seconds

Output impedance 280Ω

Dimensions 69 (W) x 28 (H) x 121 (D) mm

Weight 172g

Output terminals (RCAx2) Gold-plated terminals

Accessories 9V square dry cell battery, plug with clip (in battery case)