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Metal-Paper-Metal laminate cones?
Metal-Paper-Metal laminate cones?
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Old 8th February 2018, 03:54 PM   #21
mctavish is offline mctavish  Austria
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They were the models from around 10 years ago.... They had silver coloured woofers that were pulp paper with alu foil coatings...

They sounded quite good from what I can remember.
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Old 8th February 2018, 06:11 PM   #22
planet10 is online now planet10  Canada
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Metal-Paper-Metal laminate cones?
Quote:
Originally Posted by Dave Zan View Post
Seems like an unsuitable speaker to reduce the cone area even more.
But if the customer wanted it...
J tried to dissuade him.

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Old 9th February 2018, 10:55 PM   #23
Dave Zan is offline Dave Zan  Australia
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Quote:
Originally Posted by mctavish View Post
...They had silver coloured woofers that were pulp paper with alu foil coatings...
I found a few model numbers that use sandwich cones.
Elac seem to have a 'name' loudspeaker expert who is fairly respected in the industry, so I may make the effort to look and listen to their product.

Quote:
Originally Posted by planet10 View Post
J tried to dissuade him.
+1 for your reasonableness.


The more I think about a constrained layer damped cone, the more it appeals to me.
I will check a few OEM suppliers to see what's possible.

Best wishes
David
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Old 9th February 2018, 11:36 PM   #24
planet10 is online now planet10  Canada
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Metal-Paper-Metal laminate cones?
Probably more in vogue these days is ceramic/aluminum sandwiches. An Al cone is bombarded with particles such that the top few molecule layers are converted to a ceramic.

Can be done one side or both.

dave
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Old 10th February 2018, 12:58 AM   #25
Dave Zan is offline Dave Zan  Australia
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Quote:
Originally Posted by planet10 View Post
...ceramic/aluminum sandwiches. An Al cone is bombarded with particles such that the top few molecule layers are converted to a ceramic...
Or just anodized but marketed to sound 'technical'
Either way I suspect the layer has minimal contribution, too thin and not structurally coherent.
I haven't seen any data on this, and presumably if the results were impressive they would be publicized, but I could be mistaken.
In any case it seems unlikely to dampen the cone, ceramic is low loss and there will be no viscoelastic constrained layer.
I see the CLD as a major, maybe the main, benefit

Best wishes
David
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Old 10th February 2018, 01:00 AM   #26
planet10 is online now planet10  Canada
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Metal-Paper-Metal laminate cones?
I have only experienced it in the Mark Audio Alpair 7 and the MOAP version… there is definitely a difference.

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Old 10th February 2018, 01:10 AM   #27
Dave Zan is offline Dave Zan  Australia
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Originally Posted by planet10 View Post
I have only experienced it in the Mark Audio Alpair 7 and the MOAP version… there is definitely a difference.
Measurable? or checked with statistically validated unbiased auditions?

Best wishes
David
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Old 10th February 2018, 01:35 AM   #28
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Metal-Paper-Metal laminate cones?
I have yet to see anyone show a measure for DDR — so not yet.

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Old 10th February 2018, 02:40 AM   #29
TMM is offline TMM  Australia
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Quote:
Originally Posted by planet10 View Post
The Aura NS3 is a metal-paper laminate.

dave
Where did you read that? It's just a formed concave aluminium cone glued to a paper/kapton former. Performs just like any other concave aluminium cone.

Quote:
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I have yet to see anyone show a measure for DDR
because "DDR" is waffle for when people don't know how to relate what they hear to linear and non-linear distortion measurements.

Last edited by TMM; 10th February 2018 at 02:43 AM.
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Old 10th February 2018, 02:46 AM   #30
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Metal-Paper-Metal laminate cones?
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Where did you read that?
I didn’t read it anywhere. I drilled thru the cone and had personal experience.

Quote:
because "DDR" is waffle
It is only waffle to those that don’t grok what it means… and there seem to be quite a few so challenged.

dave
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