ScanSpeak-style cone slicing

454Casull · 28th March 2009, 08:19 AM

Has anybody ever tried this type of modification before? I'm curious about the effect it would have on paper-coned drivers with less-than-perfect frequency responses.

peterbrorsson · 28th March 2009, 10:19 AM

Like this?

http://www.diyaudio.com/forums/showt...56#post1653556

MisterTwister · 28th March 2009, 01:05 PM

yes, it has become my standard mod. slicing and adding damping material significantly reduces paper's screaming sound. effect is very audible at high volume.
sliced aluminum cone is the best, can be used full range.

454Casull · 28th March 2009, 03:06 PM

Great find. I wonder if the improvement is more pronounced if you copy SS' method.

Is there a particular reason why you didn't use liquid rubber to seal the cuts? That's what MarkMcK did for his paper Tang-Band mods.

Ron E · 28th March 2009, 03:43 PM

My brother and a friend used to get high and tinker and they concluded that if you glue toothpicks on a floppy cone in a spiral pattern (much like you see on headphone diaphragms) you can get a smoother sound. The only test equipment they had was their "augmented" ears, so.... the inverse of the idea appears to also work well...

MisterTwister · 28th March 2009, 09:04 PM

I never tried liquid rubber. 'Cascade' spray works perfectly and it is similar to rubber when it dries. I never tried to duplicate SS pattern, seems like too many cuts. 4 or 5 cuts usually are enough to smooth out all cone related impedance bumps.

peterbrorsson · 28th March 2009, 09:26 PM

A reversible trick, if cones are made of polyprop, is to put thin lines of silicone glue that are used for aquariums. Easy to pull off if it has no effect.

Peter

MisterTwister · 29th March 2009, 05:31 AM

Actually applying damping material without cone slicing has an insignificant effect on cone breakup. Aluminum cones would be hardly damped at all, even when thick layer of spray is used.

454Casull · 29th March 2009, 07:10 AM

Quote:

Originally posted by MisterTwister
Actually applying damping material without cone slicing has an insignificant effect on cone breakup. Aluminum cones would be hardly damped at all, even when thick layer of spray is used.

He's referring to glue on PP cones, which can definitely have a measurable positive effect.

somakmaitra · 29th March 2009, 07:48 AM

Hi ,
is the slicing done only superficially to the paper cone or it is sliced open totally and then glued ?

Regards ,
Somak

28th March 2009, 08:19 AM	#1
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	ScanSpeak-style cone slicing Has anybody ever tried this type of modification before? I'm curious about the effect it would have on paper-coned drivers with less-than-perfect frequency responses. __________________ Building a 2.1 system out of a 3/4"x4'x8' sheet

28th March 2009, 03:06 PM	#4
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Great find. I wonder if the improvement is more pronounced if you copy SS' method. Is there a particular reason why you didn't use liquid rubber to seal the cuts? That's what MarkMcK did for his paper Tang-Band mods. __________________ Building a 2.1 system out of a 3/4"x4'x8' sheet

28th March 2009, 03:43 PM	#5
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	My brother and a friend used to get high and tinker and they concluded that if you glue toothpicks on a floppy cone in a spiral pattern (much like you see on headphone diaphragms) you can get a smoother sound. The only test equipment they had was their "augmented" ears, so.... the inverse of the idea appears to also work well... __________________ 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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28th March 2009, 10:19 AM	#2
peterbrorsson diyAudio Member Join Date: Jan 2006 Location: Cz Rep.	Like this? http://www.diyaudio.com/forums/showt...56#post1653556

28th March 2009, 01:05 PM	#3
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	yes, it has become my standard mod. slicing and adding damping material significantly reduces paper's screaming sound. effect is very audible at high volume. sliced aluminum cone is the best, can be used full range.

28th March 2009, 09:04 PM	#6
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	I never tried liquid rubber. 'Cascade' spray works perfectly and it is similar to rubber when it dries. I never tried to duplicate SS pattern, seems like too many cuts. 4 or 5 cuts usually are enough to smooth out all cone related impedance bumps.

28th March 2009, 09:26 PM	#7
peterbrorsson diyAudio Member Join Date: Jan 2006 Location: Cz Rep.	A reversible trick, if cones are made of polyprop, is to put thin lines of silicone glue that are used for aquariums. Easy to pull off if it has no effect. Peter

29th March 2009, 05:31 AM	#8
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	Actually applying damping material without cone slicing has an insignificant effect on cone breakup. Aluminum cones would be hardly damped at all, even when thick layer of spray is used.

29th March 2009, 07:48 AM	#10
somakmaitra diyAudio Member Join Date: Mar 2003 Location: calcutta	Hi , is the slicing done only superficially to the paper cone or it is sliced open totally and then glued ? Regards , Somak

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