new flat piston dc audio sub

[scfaust 10+ year member]

http://www.stevemeadedesigns.com/board/index.php?showtopic=63468

Click to read more...

 

[Electrodynamic 10+ year member]

Cool CF flat piston. //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

 

[x1le 10+ year member]

curious to see how they differ.

 

[SPLaudio 5,000+ posts]

i love flat piston subs just with big power the former to cone is a problem along with needing a collor former to spiders on top of the spiders...

keep up the work!

 

[Electrodynamic 10+ year member]

i love flat piston subs just with big power the former to cone is a problem along with needing a collor former to spiders on top of the spiders...
keep up the work!

Correct, a collar, or other attachment method, at the former/cone joint is the most crucial with a flat piston. Former to spider isn't nearly as important with a flat piston because a spider can be tooled to mate up to a former very well without a collar.

 

[Ray21 10+ year member]

i love flat piston subs just with big power the former to cone is a problem along with needing a collor former to spiders on top of the spiders...
keep up the work!

Yep. The old eD A's were a prime example.

Very cool, I'd like to see the backside of the cone too.

 

[SPLaudio 5,000+ posts]

yea many co's have tried the flat piston but they have all failed when going with a spl or high excursion type woofer and this cone. the t connection needs to be strong. i wish u lucky rusty!

 

[loud-n-low 10+ year member]

good to see this is going to be available. I almost bought a PPI pro12 flat cone but noticed i didnt like some of the specs(39hz Fs)

 

[audioholic 5,000+ posts]

Not sure why companies still dabble with the flat piston design, other than for aesthetics. They provide some drawbacks, and no benefit over traditional conical shaped cones. I do agree they look cool tho. *shrug*

 

[hrtbrk1 5,000+ posts]

i love flat piston subs, i remember audiobahns flat piston comp subs...i loved them

 

[Papermaker85 5,000+ posts]

cone shape is naturally stronger..

carbon fiber is somewhat hard to bond with metal, but good quatitly CF is 6x stronger than steel and 3x lighter..

honestly the best way to do a flat cone is 1 single peace titainum cone/former..

or muipltial layers of CF whit a 2 peace former welded and swandwiched in the cone..

its the fact that the outter edges flex causing the glue joint to fail... so if you make the former cone joint both metal with the inner cone say stainless with a star/spoke patteren it would give you an unbreakable cone former joint(welded) ant the spoked/star/web type patteren would increase the outter cone integrity..

imo those are far supior to any technique..

 

[TnT_Sounds 10+ year member]

Correct, a collar, or other attachment method, at the former/cone joint is the most crucial with a flat piston. Former to spider isn't nearly as important with a flat piston because a spider can be tooled to mate up to a former very well without a collar.

Very good info. I'm curious to know what Rusty has done with this. //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[Toxic Tuan 10+ year member]

cone shape is naturally stronger..carbon fiber is somewhat hard to bond with metal, but good quatitly CF is 6x stronger than steel and 3x lighter..

honestly the best way to do a flat cone is 1 single peace titainum cone/former..

or muipltial layers of CF whit a 2 peace former welded and swandwiched in the cone..

its the fact that the outter edges flex causing the glue joint to fail... so if you make the former cone joint both metal with the inner cone say stainless with a star/spoke patteren it would give you an unbreakable cone former joint(welded) ant the spoked/star/web type patteren would increase the outter cone integrity..

imo those are far supior to any technique..

I couldn't agree more. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Tuan

 

[Electrodynamic 10+ year member]

Not sure why companies still dabble with the flat piston design, other than for aesthetics. They provide some drawbacks, and no benefit over traditional conical shaped cones. I do agree they look cool tho. *shrug*

As to why DC is doing this apart from the aesthetics, I'm not sure. For other company's, a flat piston offers a lot more clearance over a typical conical shaped cone, which is a major benefit in some cases. Our new BM mkIII"s wouldn't be nearly as shallow if we absolutely had to use a normal conical cone. But instead, we tooled up our own two piece carrier and top diaphragm assembly which solves the issues that papermaker spoke of in his post.

 

[audioholic 5,000+ posts]

As to why DC is doing this apart from the aesthetics, I'm not sure. For other company's, a flat piston offers a lot more clearance over a typical conical shaped cone, which is a major benefit in some cases. Our new BM mkIII"s wouldn't be nearly as shallow if we absolutely had to use a normal conical cone. But instead, we tooled up our own two piece carrier and top diaphragm assembly which solves the issues that papermaker spoke of in his post.

That is true, for a sub designed for shallow mount, flat piston offers an advantage in that regard. But otherwise, conical cones are far superior in terms of performance and other advantages. And this is coming from someone who still owns his original PPI Pro's and cant bare to part with them just because they were so cool for their day.