Back to DEMAGNITIZER
2 way Bookshelf Speaker
In this demag trial I used my 2way bookshelf speaker which uses
Visaton G-20 Tweeter and W170SC Midbass
I oftenly use this speakers to work or enjoy music so
I really understand its sound character.
Among all demagnetization process I have done, speaker demagnetize
is the longest I have to do, because each driver require
5 minute demag time until reach noticable improvement. Demagnetizing
a pair of 2way speakers totally takes 20 minutes.
Speaker demagnetizing is actually done on the voice
coil. Because the voice coil is very close to speaker's magnet,
no wonder if voice coil finally will have magnetic property, that can inhibit
the flow of electric current from the power amplifier to speaker..
In the following two pictures I did a photo shoot with the probe
slightly sideways, I did this so that this process is easily
visible, but in the actual process the position of the probe must be
perpendicular to the conus so that the voice coil that is right behind
the conus gets a magnetic field demag which is sufficient to eliminate
the magnetic properties that occur because it is too long adjacent to
The speaker demag process takes a long time compared to the
demag process on other audio equipment objects, because the magnetic
field produced by the DEMAGNITIZER probe must fight the magnetic field
produced by the speaker magnet, besides that the magnetic field of the
probe to reach the voice coil must be able to penetrate the conus and
For cones and membranes made of materials such as paper, cardboard
or fabric / fabric and also polyproylene, the magnetic field of the probe
easily penetrates and enters the voice coil, but if the material is
of aluminum, or a metal that rejects the magnetic field the demagnetization
process cannot be carried out.
The first process I did was on the tweeter and then I continued
on mid bass.
After the process was carried out on all four drvers and then I did a
hearing test, I used few album from Fourplay and Mantovani Orchestra
I found positive results that were more or less the same as the demag
process I did on other audio devices, namely, stereo image became wider,
and a deeper depth and precision when listening to orchestra music. Bass
tones that come out of the midbass driver sound more control and not boomy
as before and the cimbal sound coming out of the tweeter sounds smoother
than the one that previously sounded a little rough or often referred to
When listening to orchestra music besides the sound of the violin sounds
more dynamic, the impression of being in a wider concert room is also felt.
There was also one thing that I felt but was a little hesitant to say
it because I did not have an SPL meter, that was the sensitivity of my speaker
Of all the demag processes that I have done, I feel that the speakers
demagnetizing are giving the most significant results, this fact gives
a question in my mind, do I need to make a special DEMAGNITIZER for speakers?
CD Album used to test result of demag Process