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Magnet Size ?


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vdubmk4 
Copper - Posts: 175
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Joined: August 04, 2004
Location: United States
Posted: October 25, 2004 at 9:32 PM / IP Logged  
What's up with magnet size ? Should magnet size be taken into real consideration when choosing a subwoofer ? Personally I have found that magnet size doesn't have a whole lot of correlation with performance. I just wondering what yalls experience is ?
Fortune: You will continue to take chances, and be glad you did.
forbidden 
Platinum - Posts: 5,353
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Joined: November 01, 2003
Location: Alberta, Canada
Posted: October 25, 2004 at 9:46 PM / IP Logged  
No...... strength of the magent depends on the materials used in construction.
Top Secret, I can tell you but then my wife will kill me.
stevdart 
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Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: October 25, 2004 at 9:46 PM / IP Logged  
http://www.ultimate-sounds.com/volfenhag/subs.htm ........an example here of how the riff-raff of the industry uses such things as magnet size to attract the ignorant and unwary first-timers.  BTW, those are real Volfenhags...not the fake ones!  ;)
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
forbidden 
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Location: Alberta, Canada
Posted: October 25, 2004 at 9:47 PM / IP Logged  
Oh, sure, post before I can check my magent spelling......
Top Secret, I can tell you but then my wife will kill me.
vdubmk4 
Copper - Posts: 175
Copper spacespace
Joined: August 04, 2004
Location: United States
Posted: October 25, 2004 at 9:52 PM / IP Logged  
Sorry Steve. I'm not sure what ur getting at. Did you post that site to show an example of a sub with a big magnet but not so big sound ?
Fortune: You will continue to take chances, and be glad you did.
kfr01 
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Posted: October 25, 2004 at 9:59 PM / IP Logged  

See: http://www.bcae1.com/speaker.htm  at http://www.bcae1.com/

It will explain what the magnet does and you'll see that forbidden is right re: the material used.

New Project: 2003 Pathfinder
stevdart 
Platinum - Posts: 5,816
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Location: Pennsylvania, United States
Posted: October 25, 2004 at 10:03 PM / IP Logged  

Crap construction, zero R&D, fake country of origin by the use of a German-sounding name, crappy sound, literature that insinuates high quality....all marketing gimmicks with a low level product.  Most of what you see with this "brand" consists of emphasizing the magent (thanks Rob for the help with the spelling) weight.  It was the first thing to come to mind when I read the post question.  I clicked on one of those shown there, the ones with the magent sticking up at the camera.....180 oz.  Now, by golly, that must be a super competition subwoofer!

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
vdubmk4 
Copper - Posts: 175
Copper spacespace
Joined: August 04, 2004
Location: United States
Posted: October 25, 2004 at 10:05 PM / IP Logged  
Hahaha, gotcha, thanks.
Fortune: You will continue to take chances, and be glad you did.
sk8ingsmurf 
Copper - Posts: 198
Copper spacespace
Joined: March 18, 2004
Location: United States
Posted: October 25, 2004 at 10:40 PM / IP Logged  

I like this part....

"WARNING!

THESE SUBWOOFERS ARE CAPABLE OF
HIGH SOUND PRESSURE LEVELS. 
EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE 
HEARING LOSS OR DAMAGE."

You mean to tell me that those things get loud? Sweet, I want a pair!

Steven Kephart 
Platinum - Posts: 1,737
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Joined: November 06, 2003
Location: Oregon, United States
Posted: October 26, 2004 at 2:57 AM / IP Logged  

I agree with the consensus.  There are way too many things to take into account.  First of all, too much motor force can actually hurt you.  You need just enough for the intended design.   Also, a really large magnet used poorly can just be a waste.  For instance, a motor that uses huge magnets but doesn't have much steel around to direct the force of those magnets (called magnetic flux) is a waste.  Picture a lot of people at the DMV (magnetic flux) and only one teller is open.  You have a lot of people not going anywhere.

Steven Kephart

Adire Audio

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