Deeper cone? Is it special?

[tommyk90 5,000+ posts]

Lol.
Getting to be more and more like my responses after I explain something. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

nG

Agreed.

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[ngsm13 5,000+ posts]

Pictures > Short Answer > Long Audioholic answer. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Look at that image and imagine two 3D shapes. The red and green filler is total air displacement and the two radiating surfaces vary. One is flat and the other is conical. When the flat piston moves up and down, it's stroke will cover the green area. When the conical surface moves up and down, its stroke is the red area (imagine that the red area is actually cone shaped because it's hard to do that in paint!). As long as their stroke (height) is the same and they have the same diameter, they will have the same displacement regardless of how deep the cone is.

You should be able to see that very easily; Imagine the red bottom part of the cone moving up the white part. The total amount of red would equal the total amount of green, wouldn't it?

I was just in paint trying to help these tards... you beat me to it... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

nG

 

[audioholic 5,000+ posts]

*slouch*

 

[Immacomputer 10+ year member]

I was just in paint trying to help these tards... you beat me to it... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
nG

My MSPaint skills are almost god-like.

 

[audioholic 5,000+ posts]

Almost.

 

[ngsm13 5,000+ posts]

Almost.

Surprise we didn't have a solidworks submission from you! //content.invisioncic.com/y282845/emoticons/redface.gif.62fdbfe1a101588a808c4cff71bcb942.gif

nG

 

[audioholic 5,000+ posts]

Surprise we didn't have a solidworks submission from you! //content.invisioncic.com/y282845/emoticons/redface.gif.62fdbfe1a101588a808c4cff71bcb942.gif
nG

lol

 

[squeak9798 5,000+ posts]

You are mistaken, and it is totally true. A piston's shape affects how much volume of air is left within the combustion chamber at top-dead-center of the piston's stroke. A flat-top piston will leave a larger area in the combustion chamber than will its domed counterpart. This means that given the same stroke (piston shape does not affect crank stroke length), the domed piston will compress the same amount of air/fuel mixture to a greater degree, thus 'squeezing' more energy out of it.

So does this mean cone shape affects how a speaker behaves in a bandpass enclosure ?

//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[fbi90909 5,000+ posts]

i wondered a bit about how the cone affects sound. and when i saw this thread this came to mind as i have a friend who ones a pair and bought them cause he believed they created a whirl with the sound waves.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

think it's true??

 

[mrogowski 5,000+ posts]

So does this mean cone shape affects how a speaker behaves in a bandpass enclosure ?


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Only if they are Funky Pups //content.invisioncic.com/y282845/emoticons/nerd.gif.c6fa51ddf7ff75f1c0371fbc648f70ae.gif

 

[mrogowski 5,000+ posts]

i wondered a bit about how the cone affects sound. and when i saw this thread this came to mind as i have a friend who ones a pair and bought them cause he believed they created a whirl with the sound waves.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

think it's true??

Well, you just keep letting him believe that.

Cone shape/geometry doesn't start becoming a factor until you increase frequency - well beyond the passband of a sub.

 

[jmanpc 5,000+ posts]

i wondered a bit about how the cone affects sound. and when i saw this thread this came to mind as i have a friend who ones a pair and bought them cause he believed they created a whirl with the sound waves.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

think it's true??

ahahaha i have one of those in my living room right now as the sub for the HT. It sweeps away whoever is in front of it with a tornado when it hits. >_>

I pulled it outta my gf's car and gave her a Treo TSX.

 

[fbi90909 5,000+ posts]

Well, you just keep letting him believe that.
Cone shape/geometry doesn't start becoming a factor until you increase frequency - well beyond the passband of a sub.

he doesn't. i convicsed him long ago to switch subs too. he runs a pair of Fi X's

 

[audioholic 5,000+ posts]

So does this mean cone shape affects how a speaker behaves in a bandpass enclosure ?




//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

It affects it exactly the same amount as it does in a sealed box.
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[mdillon 10+ year member]

new question. the picture illustrates just the front of the cone.

isnt a flat piston cone still a parabolic cone in the rear? would these two different shapes affect anything as far as rear waves?