New ceramic drivers from SB Acoustics

[gornir]

Looks nice!

SB Acoustics :: 4" SB12CACS25-4
SB Acoustics :: 5" SB15CAC30-4
SB Acoustics :: 6" SB17CAC35-4
SB Acoustics :: 8" SB23CACS45-8

I will test it, when available!

Regards

/Göran

 

[eriksquires]

Very interesting!!

Weird I could not find the cone material listed anywhere.

Best,

E

 

[gornir]

Very interesting!!

Weird I could not find the cone material listed anywhere.

Best,

E

From the specification sheet:

"Geometrically reinforced ceramic cone for optimum piston operation and reduced break-up"

/G

 

[Zvu]

Geez Göran... If you measure all those drivers when they become available, i'll let you adopt me

 

[gornir]

I also noticed that they now ship black versions of the alu drivers (NAC).

Similar to the drivers used in the Revel Performa series.

I only wish that they will release a nice waveguide tweeter as well.

/G

 

[Zvu]

They introduce their models slowly, allowing the people to hit their head against the wall for being impatient.

Black SB23NBACS45 looks way better than the one with silver cone.

 

[silverprout]

It is a ceramic cone or a ceramic coated metal cone ?

 

[Eldam]

Why they don't measure their speakers at one meter ?

 

[GDO]

It is a ceramic cone or a ceramic coated metal cone ?

Might also be ceramic coated paper, Focal made cones like this and called them W glass, Silver Flute too, i guess a chimical treatment leaving a mineral coating at both faces of the cone...

Break up modes are strong but somewhat scattered.

Regarding these SBA, the 8' is interesting, the rest me-too midwoofers as plenty on the market, nothing new under the sun, simply more choice for diyers...

 

[eriksquires]

From the specification sheet:

"Geometrically reinforced ceramic cone for optimum piston operation and reduced break-up"

/G

Doh!!

 

[Eldam]

The W has a foamed rohacell core if I don't mistake, don't know how they coat the "glass" but the surface is not smooth, a little like grain of sand...

Or it's FauxCal !

There are finally many drivers makers which took the idea of a sandwich with a foam core structure : also B&W ? The brand also than Focal Audio speakers chose... iirc.

 

[GDO]

The W has a foamed rohacell core if I don't mistake, don't know how they coat the "glass" but the surface is not smooth, a little like grain of sand...

Or it's FauxCal !

Yes, you are absolutely right, i was refering to a former cone treatment Focal called Polyglass, applied on paper...

https://www.focal.com/en/polyglass-cone

 

[silverprout]

"The rigidity index exceeds even that of a single skin Kevlar® and is almost ten times superior to one of polypropylene..."

kevlar is not remarkably rigid.

 

[GDO]

In the case of the 8' model, SBA stuff doesnt look super rigid...

But i like this little chaos, guess it is less irritating than one strong peak. Might sound like a Lowther...

An externally hosted image should be here but it was not working when we last tested it.

 

[Zvu]

Rigid up to 1,7KHz.

 

[silverprout]

IMHO, if you are looking for the world stiffest cone, you should look at the Morel Carbon fiber/Rohacell/Carbon fiber cones woofers.

Unbeatable.

https://www.parts-express.com/morel-tscw-636-titanium-supreme-series-6-woofer-6-ohm--297-107

 

[Eldam]

Yes, you are absolutely right, i was refering to a former cone treatment Focal called Polyglass, applied on paper...

https://www.focal.com/en/polyglass-cone

Damned french, it must be wine proof...

"a sandwich, a glass of wine, la vie est belle !" (You was thirsty, Focal made it !)

 

[GDO]

IMHO, if you are looking for the world stiffest cone, you should look at the Morel Carbon fiber/Rohacell/Carbon fiber cones woofers.

Unbeatable.

https://www.parts-express.com/morel-tscw-636-titanium-supreme-series-6-woofer-6-ohm--297-107

Mmm... This is for me the contrary of rigid, with controled multiple break up modes, as most full rangers work.

Rigid like ceramic or diamond gives one strong peak at break up.

C173-6-096

 

[eriksquires]

So one thing that is kind of weird is that despite being ceramic, they also seem to use the standard 3-part construction. Cone, dust cap and voice coil former.

Actually it's weird any metal cone driver does this too.

Wonder why. I mean if I was going to go through the trouble of making a pure ceramic driver, I would at least eliminate the dust cap.

 

[Eldam]

There are no ceramic or aluminium drivers with the material for the dust cap ? Or you mean: to make a perfect cone like we see in some aluminium bass drivers ?