Deeper cone? Is it special?

[Immacomputer 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?

Actually, true flat piston subs have a longer voice coil former that meets the flat cone. Some subs do use the flat dust cap to make it look like a true flat piston cone but they're not. Neither configuration directly affect the bass sound wave.

They're just a radiating surface, just like the air in the port; all that matters is the radiating area, not the contour of it.

 

[MyFartsStink 10+ year member]

Thanks for clearing this up with some detailed descriptions, I now get why it wont be more cone area. This has been something that was on my mind for a long time. I was thinking of doing an experiment, but **** it, Id rather spend the money else where.

 

[audioholic 5,000+ posts]

No realistic way to test this, unless you plan on reconing the same driver with two different cones. Otherwise discerning any performance differences based on cone shape alone would be impossible. But as already shown, this test is not necessary anyway.

 

[MyFartsStink 10+ year member]

Yeah I thought of that, and thats when I decided to say **** it.

 

[Incriminator 10+ year member]

Only think a deep cone is good for is strength! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[audioholic 5,000+ posts]

And increasing mounting depth. In this day and age the shape of the cone is less important for strength. Hell look at Kicker using plastic square cones. lol

Dan Wiggins was once quoted saying that given the right circumstances, he could make a washing machine into a speaker diaphragm that sounded beautiful... and with a parthenon motor, I believe he could.

 

[MyFartsStink 10+ year member]

So I have read in magazines that different material in the cone can acousticly change the sound, but then again its for alot of speaker reviews and they pay the magazines to give them good reviews. Also would putting sound deadener in the enclosure, or on the cone make it sound different? I have heard that it does in good and bad ways. But im sure audioholic knows.

 

[bumpincrv 10+ year member]

This cant be totally true. Why do think they make domed, half domed, and several other designs for the top of the piston? certain designs affect the air being pushed in different ways.

The only reason there are different designs of pistons is to increase or decrease the compresion ratio.

 

[audioholic 5,000+ posts]

Yes different materials react differently. Metal cones can 'ring', while a paper cone tends to be more 'dead'. But realisitcally any material can and will resonate, creating *some* anomolies.

Speaker cone material is usually thought of in terms of strength to weight ratios. Pressed/treated pulp paper cones generally offer the best ratio (better than alum or even titanium) and make up the vast majority of speaker cones made/used around the world.

Some companies offer exotic materials to claim better performance, who is to really say if it provides a noticeable difference, in the end, its the over all speaker design that counts. the cone, and the material its made of, are merely one component that goes into the final product.

Cone shape can and also does affect standing waves on the cone surface. IIRC, that's the reason for the odd shaped wave patterns found in the Revelator series of speakers, to break up standing waves on the cone. For example.

 

[MyFartsStink 10+ year member]

Yes different materials react differently. Metal cones can 'ring', while a paper cone tends to be more 'dead'. But realisitcally any material can and will resonate, creating *some* anomolies.
Speaker cone material is usually thought of in terms of strength to weight ratios. Pressed/treated pulp paper cones generally offer the best ratio (better than alum or even titanium) and make up the vast majority of speaker cones made/used around the world.

Some companies offer exotic materials to claim better performance, who is to really say if it provides a noticeable difference, in the end, its the over all speaker design that counts. the cone, and the material its made of, are merely one component that goes into the final product.

Cone shape can and also does affect standing waves on the cone surface. IIRC, that's the reason for the odd shaped wave patterns found in the Revelator series of speakers, to break up standing waves on the cone. For example.

Yes but you would always have standing waves in everything. Unless the enclosure is round and the speak is perfect. but correct me if im wrong.

 

[audioholic 5,000+ posts]

Yes but you would always have standing waves in everything. Unless the enclosure is round and the speak is perfect. but correct me if im wrong.

You are referring to standing waves inside the enclosure (rear waves).

 

[Hintzyboy 5,000+ posts]

If I ever win the lottery and have more money than I can use, I'm going to do a cone-switch to see what happens. Hopefully, there will be a difference and Audioholic's head esplodes trying to explain it:laugh:

 

[audioholic 5,000+ posts]

Dream big I always say.

 

[squeak9798 5,000+ posts]

Cone shape can and also does affect standing waves on the cone surface. IIRC, that's the reason for the odd shaped wave patterns found in the Revelator series of speakers, to break up standing waves on the cone. For example.

The "slit" cone is to reduce the cone's break-up modes.

 

[audioholic 5,000+ posts]

You mean nodes. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif