Anyone has a cutaway view of a flat cone woofer? How does these things work? Do they perform better than traditional conical shape woofers?
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Flat Cone woofers
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Re: Flat Cone woofers
I'd imagine them to be something similar to the JL W7's Wcone? http://mobile.jlaudio.com/products_s...php?page_id=37
I find myself curious also.

Re: Flat Cone woofers
If you do the math, the surface area of a flat cone will be less than a standard conical shaped cone. Volume of air moved is directly proportional to the surface area of the cone.
Conclusion, a standard cone will move more air than a flat cone.
A flat cone will be lighter as pointed out in the well prepared marketing presentation at the link provided in a previous post.
There's always tradeoffs. ;)Live in Southern N.E.? check out the CT Audio Society web site.
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Re: Flat Cone woofers
What is the tradeoff? @carlspeak....The specs on this TB appears to exceeds some traditional conical drivers. Given the same specs with a flat cone versus a traditional cone woofer, are you saying that the traditonal cone will sound better?
I really need a sectional view of this driver to really understand how this thing works? Looking at the photo, is the top layer some sort of protection screen or dust cover?
Tang Band WT1427G 10" Neo Subwoofer  Description
This unique subwoofer features a low profile (33/16"), long throw design, making it one of the few 10" subwoofers which can be mounted inwall. This is made possible by a strong neodymium magnet assembly and large voice coil. When depth is an issue and bass is a must, look no further than this a oneofakind, high quality subwoofer. Specifications: *Power Handling: 120 watts RMS/240 watts max *VCdia: 21/2" *Impedance: 4 ohms *Re: 3.2 ohms *Frequency range: 25400 Hz *Fs: 25 Hz *SPL: 85 dB 1W/1m *Vas: 1.35 cu. ft. *Qms: 3.42 *Qes: 0.31 *Qts: 0.29 *Xmax 9.5 mm *Dimensions: Overall diameter 101/2", Cutout diameter 91/4", Depth 33/16".
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Re: Flat Cone woofers
Originally posted by paradigm View Post
What is the tradeoff? @carlspeak....The specs on this TB appears to exceeds some traditional conical drivers. Given the same specs with a flat cone versus a traditional cone woofer, are you saying that the traditonal cone will sound better?
I really need a sectional view of this driver to really understand how this thing works? Looking at the photo, is the top layer some sort of protection screen or dust cover?
Tang Band WT1427G 10" Neo Subwoofer  Description
This unique subwoofer features a low profile (33/16"), long throw design, making it one of the few 10" subwoofers which can be mounted inwall. This is made possible by a strong neodymium magnet assembly and large voice coil. When depth is an issue and bass is a must, look no further than this a oneofakind, high quality subwoofer. Specifications: *Power Handling: 120 watts RMS/240 watts max *VCdia: 21/2" *Impedance: 4 ohms *Re: 3.2 ohms *Frequency range: 25400 Hz *Fs: 25 Hz *SPL: 85 dB 1W/1m *Vas: 1.35 cu. ft. *Qms: 3.42 *Qes: 0.31 *Qts: 0.29 *Xmax 9.5 mm *Dimensions: Overall diameter 101/2", Cutout diameter 91/4", Depth 33/16".Live in Southern N.E.? check out the CT Audio Society web site.
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Re: Flat Cone woofers
Originally posted by carlspeak View PostIf you do the math, the surface area of a flat cone will be less than a standard conical shaped cone. Volume of air moved is directly proportional to the surface area of the cone.
Conclusion, a standard cone will move more air than a flat cone.
What part of that equation is influenced by the shape of the cone?Brian Steele
www.diysubwoofers.org
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Re: Flat Cone woofers
Originally posted by Brian Steele View PostSd is the effective radiating area of the driver, and its calculated using the equation 3.1416*D^2/4, where D is the diameter of the cone plus onethird of the surround at both ends of the measurement (LDC, 5th edition, page 20).
What part of that equation is influenced by the shape of the cone?
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Re: Flat Cone woofers
Originally posted by Brian Steele View PostSd is the effective radiating area of the driver, and its calculated using the equation 3.1416*D^2/4, where D is the diameter of the cone plus onethird of the surround at both ends of the measurement (LDC, 5th edition, page 20).
What part of that equation is influenced by the shape of the cone?
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Re: Flat Cone woofers
Originally posted by Herman Trivilino View PostNone. That's the formula for the area of a (flat) circle. It doesn't take into account the fact that the shape is a cone. Either the increased area you get from a cone versus a flat circle is not relevant, or that formula applies only to flat drivers.Brian Steele
www.diysubwoofers.org
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Re: Flat Cone woofers
Originally posted by Brian Steele View PostSd is the effective radiating area of the driver, and its calculated using the equation 3.1416*D^2/4, where D is the diameter of the cone plus onethird of the surround at both ends of the measurement (LDC, 5th edition, page 20).
What part of that equation is influenced by the shape of the cone?
Comment

Re: Flat Cone woofers
Originally posted by carlspeak View PostIf you do the math, the surface area of a flat cone will be less than a standard conical shaped cone. Volume of air moved is directly proportional to the surface area of the cone.
Conclusion, a standard cone will move more air than a flat cone.
A flat cone will be lighter as pointed out in the well prepared marketing presentation at the link provided in a previous post.
There's always tradeoffs. ;)
The shape of the cone matters not so long as it acts as a piston, does not breakup through the intended bandwidth, and the motor & suspension remain linear throughout its intended stroke.
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Re: Flat Cone woofers
It seems intuitive to me that the frontal area of the cone would be the critical dimension to amount of air moved, this would agree with the definition of Sd given above. I'm thinking about it similarly to the frontal area used for drag calculations in aerodynamics. Its the projected area in a front view that is critical for moving air.
I don't really have any experience with flat cone drivers but my concern would be with rigidity of the cone. The curvature of a standard cone provides more strength compared to a flat sheet. Maybe this is handled with thicker material or some other construction type, a section of a flat cone driver would be nice to see.
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Re: Flat Cone woofers
Originally posted by Dirttracker73 View Post+1. Displacement is dependent only on area and linear travel.
However it is made, or what shape, doesn't matter. As long as it is light and stiff it will work.
Flat cones are used to make the driver shallower, and because it looks cool, or at least different.
Duane
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Re: Flat Cone woofers
All things equal, the flat cone will break up earlier:
http://www.loudsoft.com/loudsoft/my%...LMA%202003.pdf
Dan"guitar polygamy is a satisfying and socially acceptable alternative lifestyle."~Tony Woolley
http://dtmblabber.blogspot.com/
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