DIY speaker driver?

hofffam · 2nd February 2009, 04:00 PM

Don't know if you guys can help or not....

My son wants to build a speaker driver for a physics project.

I have built many speaker systems over the years. But I have never built a driver.

Anyone done this - whether as an experiment or more seriously?

Any basic parameters such as coil turns, wire gauge, and appropriate magnets?

Any help appreciated.

Ron E · 2nd February 2009, 04:11 PM

Do a search for a post by a person named Vikash. He had a webpage where he tried this.

I posted a spreadsheet in that thread that can be used for driver design. It transforms turns of wire, mass, etc into T/S parameters... It doesn't do the magnetic portion though, You need to use a program like FEMM to model the magnetic system, then you can Enter B (gap magnetic flux) into the spreadsheet.

Have fun!

el`Ol · 2nd February 2009, 05:27 PM

Here are some useful formulas:
http://www.picosound.de/D_soft.htm#tspchk
Bl is B*l, Flux*length of wire in the field. More valid for achieving a correct damping is B*m, m=mass of copper in the field, compared to the whole moving mass.

john blackburn · 2nd February 2009, 05:50 PM

hofffam

Here is the driver designed by Vikash.

http://www.vikash.info/audio/transdu...sign/index.asp

John

2nd February 2009, 04:00 PM	#1
hofffam diyAudio Member Join Date: Sep 2004 Location: Texas	DIY speaker driver? Don't know if you guys can help or not.... My son wants to build a speaker driver for a physics project. I have built many speaker systems over the years. But I have never built a driver. Anyone done this - whether as an experiment or more seriously? Any basic parameters such as coil turns, wire gauge, and appropriate magnets? Any help appreciated.

2nd February 2009, 04:11 PM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Do a search for a post by a person named Vikash. He had a webpage where he tried this. I posted a spreadsheet in that thread that can be used for driver design. It transforms turns of wire, mass, etc into T/S parameters... It doesn't do the magnetic portion though, You need to use a program like FEMM to model the magnetic system, then you can Enter B (gap magnetic flux) into the spreadsheet. Have fun! __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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2nd February 2009, 05:27 PM	#3
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Here are some useful formulas: http://www.picosound.de/D_soft.htm#tspchk Bl is Bl, Fluxlength of wire in the field. More valid for achieving a correct damping is B*m, m=mass of copper in the field, compared to the whole moving mass.

2nd February 2009, 05:50 PM	#4
john blackburn diyAudio Member Join Date: Sep 2006 Location: Wirral UK	hofffam Here is the driver designed by Vikash. http://www.vikash.info/audio/transdu...sign/index.asp John

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