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PurdueRy

Lifer
Nov 12, 2004
13,837
4
0
I really don't think there is anything that high(it seems to go against many physics principals too ;))....why do you need that much excursion???
 
H

Howard

Lifer
Oct 14, 1999
47,982
11
81
There would be no problem with high pressures on both sides of the cone, seeing as how the forces would add to 0.

Tell me what your application is and I may decide to help you.
 
M

merlocka

Platinum Member
Nov 24, 1999
2,832
0
0
They most likely do exist so the next question is if these were arranged in a fashion that puts high pressure on both sides of the cone will there be problems at lower frequencies and high input levels? Thermal problems and mechanical stress problems with the cone and suspension attachment points perhaps?

The ideal system will use a voice coil and elektromagnat instead of a perm mag motor. Amplifiers will power both sides of the motor and a 86,000 mips controller will intervene as movement tracking deviates from program material, etc.
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I call shens.

Anyone who really wanted feedback with that level of detail, would know that there are (with all due respect to ATOT) obviously better places to ask. Sounds like someone read a speaker design book and wanted to wank knowledge on AT.


 
H

Howard

Lifer
Oct 14, 1999
47,982
11
81
Originally posted by: ThisIsMatt
Originally posted by: Howard
Tell me what your application is and I may decide to help you.
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Very nice of you, prick :)
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I could have not responded at all. :)

Besides, for somebody who's ascended to a higher place than we have shouldn't need to ask about stuff like this.
 
V

Viperoni

Lifer
Jan 4, 2000
11,084
1
71
90mm from a 10 inch.... sounds like you want as much SPL as possible from a small box.... got voice coil diameter and power? ;)
 
H

Howard

Lifer
Oct 14, 1999
47,982
11
81
If the upper limit of the passband is not too high, you can build a "well" and mount multiple low-depth drivers on the side of it. Imagine a rectangular-section Sonotube, then visualize holes being drilled into one side with drivers mounted in them.

If a 10" square is all you the frontal area you have, the required cross-sectional area of the enclosure will likely cause noticeable "port" noise.

I can't be any more specific than that unless I have a better idea of the space the system will be fitting into.
 
T

Tiamat

Lifer
Nov 25, 2003
14,068
5
71
you are better off getting an 18" cone like the Avalanche one used often in Infinite Baffle solutions. check out avsforum for more links and data. I think this puppy gets ±2" excursion but i could be wrong.

High Excursion leads to high distortion in most cases. The more the cone is far away from the voice coil, the less control is exerted and the woofer cone is allowed to deviate causing distortion. Perhaps the second harmonic isnt too bad, but a lot of third harmonic would be terrible sounding.

 
H

Howard

Lifer
Oct 14, 1999
47,982
11
81
Originally posted by: Tiamat
you are better off getting an 18" cone like the Avalanche one used often in Infinite Baffle solutions. check out avsforum for more links and data. I think this puppy gets ±2" excursion but i could be wrong.

High Excursion leads to high distortion in most cases. The more the cone is far away from the voice coil, the less control is exerted and the woofer cone is allowed to deviate causing distortion. Perhaps the second harmonic isnt too bad, but a lot of third harmonic would be terrible sounding.
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I don't think he has that much width, otherwise he wouldn't specify such a small woofer size.
 
T

Tiamat

Lifer
Nov 25, 2003
14,068
5
71
Originally posted by: Howard
Originally posted by: Tiamat
you are better off getting an 18" cone like the Avalanche one used often in Infinite Baffle solutions. check out avsforum for more links and data. I think this puppy gets ±2" excursion but i could be wrong.

High Excursion leads to high distortion in most cases. The more the cone is far away from the voice coil, the less control is exerted and the woofer cone is allowed to deviate causing distortion. Perhaps the second harmonic isnt too bad, but a lot of third harmonic would be terrible sounding.
Click to expand...
I don't think he has that much width, otherwise he wouldn't specify such a small woofer size.
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Yeah, I was trying to imply that so much excursion in only a 10" cone is almost ludicris.

it would probably be better to get 2 10" cones and use them in a push-pull type box.
 
Rubycon

Rubycon

Madame President
Aug 10, 2005
17,768
485
126
Note to moderator:

please remove this thread from your forums - I have been threatened by a certain individual with a lawsuit.

Thanks!
 
T

tami

Lifer
Nov 14, 2004
11,588
3
81
Originally posted by: C6FT7
Note to moderator:

please remove this thread from your forums - I have been threatened by a certain individual with a lawsuit.

Thanks!
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what in the world?
 
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