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Old 10th November 2019, 03:36 AM   #61
GUNFU is offline GUNFU  Russian Federation
diyAudio Member
Join Date: Mar 2017
Originally Posted by planet10 View Post
One of the reasons is that to mag them you need a magcharger of considerably larger size and cubic dollars.

How do you think a magnet with the smallest coercive force can require the largest field and the most powerful installation for its magnetization?
Permanent Magnet Material................ Alnico Ferrite NdFeB SmCo5 Sm2Co17
Magnetic field level for saturation......... 0,5....... 1........ 3.......... 2,5...... 5-6
magnet, T
Технологическое оборудование для намагничивания, регулирования и размагничивания постоянных магнитов >> Конструкторское бюро электроаппаратуры

Originally Posted by TonyTecson View Post
alnico is fine, but it is not the only one....
otherwise, all speaker should have been made with only alnico magnets...
That's right, there are a huge number of great-sounding speakers made with a ferrite magnet and there are also a lot of bad speakers made from Alnico.
Originally Posted by ghemml View Post
LOL, I also made them due to marketing, Alnico are expensive and difficult to custom make, and cast alnico need to have molds which is additional tool cost
In your case, an electromagnet with a magnetic circuit from permendura might be even more profitable for marketing.

Last edited by GUNFU; 10th November 2019 at 03:47 AM.
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