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Speaker damping paint/coating
Speaker damping paint/coating
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Old 21st May 2020, 12:10 AM   #11
planet10 is offline planet10  Canada
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Speaker damping paint/coating
Given the high level of bracing in these enclosures, panle damping will be counterproductive.

And since Scott did not catch it, Kongo & Kirishima are horns, not BVRs.

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Old 21st May 2020, 09:27 AM   #12
KaffiMann is offline KaffiMann  Norway
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Speaker damping paint/coating
Think we're all in agreement, some kind of silly paint will not do anything useful if applied to the horns in 1st post.

We can have a discussion about energy distribution, handling or dampening anywhere. But it is not what this thread is about.
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Old 21st May 2020, 09:42 AM   #13
Scottmoose is offline Scottmoose  United Kingdom
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Yes it is. That's exactly what it's about. The OP was asking about panel damping sprays / paints / coatings. How is that not about 'energy distribution, handling or dampening'? Completely useless in this application, as I and others (including yourself) have noted.
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Old 22nd May 2020, 04:25 PM   #14
KaffiMann is offline KaffiMann  Norway
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Speaker damping paint/coating
Because he's asking if previously mentioned "silly paint" will make any meaningful difference. That's why it's not about the 'energy distribution, handling or dampening'. A piece of aluminium foil glued to a surface will have more impact, still nothing to write home about and also irrelevant.
If it helps you feel better it's more about what does not help, or make close to insignificant impact on 'energy distribution, handling or dampening'.
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Old 22nd May 2020, 04:43 PM   #15
Scottmoose is offline Scottmoose  United Kingdom
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Really? The OP asked about damping paint. Quote:

Quote:
Want to coat the interiors to deaden the "boxes"

Has anyone done this?

If so, what materials have been used and to what effect?
Close quote.

That is a question that is specifically about 'energy distribution, handling or dampening', unless we have entered an alternate physical reality where panel damping of any kind is, by some osomosis previously unbeknown to woman-born, unconnected to such matters. The degree of effectiveness is irrelevant to that fundamental starting point. Thus, before you joined the thread, the gentleman received several replies to his question, which had already covered what was required, the essence of which can be distilled into two basic points:

1/ These enclosures do not require panel damping, which will be counter productive, and

2/ Paint of the types commercially available will have no practical impact upon panel resonance (aka 'energy distribution') anyway.
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Old 23rd May 2020, 05:25 AM   #16
KaffiMann is offline KaffiMann  Norway
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Very well, guess I had it coming.
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Old 23rd May 2020, 09:21 AM   #17
Scottmoose is offline Scottmoose  United Kingdom
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Life's too short -crack open your choice of refreshment and try to forget the lunacy that's going on around us all at present.

I favour watching The Grand Tour.
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Old 23rd May 2020, 01:23 PM   #18
danny_66 is online now danny_66  Belgium
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The most effective for damping is to add bracing.
As for paint, search for bitumen undercoating that is used for the underside of cars.
I also had good success with the damping material basotect.

Put all 3 suggestions together and you'll have a very good damped cabinet.
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Old 23rd May 2020, 01:35 PM   #19
Scottmoose is offline Scottmoose  United Kingdom
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As a couple of general notes on that:

-Bracing does not increase damping in the ordinarily understood sense. It just increases the resonant frequency of a panel of a given material & dimensions (and raises the Q of that resonance).

-Bitumen applied to a panel adds mass, and thereby lowers the resonant frequency (and Q of that resonance).

As a result, you have to be careful if you do both, since one counteracts the other. You add bracing to increase the Fs of a panel, and then by coating those panels with bitumen, you lower the panel Fs back down again. A small amount strategically placed may be useful, but it depends on the type of enclosure. With the speakers in question, the object is to shunt panel Fs as high as possible. They don't need additional bracing if a quality grade of void-free ply is used as the internal horn structure already provides that.

Basotect has decent acoustic damping properties; these enclosures were designed for a minimal quantity of acoustic fibreglass board, natural-fibre felt (wool, jute, recycled denim etc.) but it would serve as an alternative.
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Old 30th May 2020, 10:41 PM   #20
KaffiMann is offline KaffiMann  Norway
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Speaker damping paint/coating
Quote:
Originally Posted by Scottmoose View Post
Life's too short -crack open your choice of refreshment and try to forget the lunacy that's going on around us all at present.
Indeed, but what I meant was: That's what I get for not reading stuff and posting replies when I'm in a hurry.

Quote:
Originally Posted by Scottmoose View Post
I favour watching The Grand Tour.
Just barely had the time to note your reply whilst on the airport, was deeply disappointed when it turned out there's nothing new since that 1st episode on 4th season...

The James May going to Japan thing was pretty good though, was sort of funny when he was trying his hand on piano tuning.
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