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Basotect for damping BR-cabinet?!
Basotect for damping BR-cabinet?!
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Old 6th March 2018, 11:21 PM   #1
hugo stiglitz is offline hugo stiglitz  Germany
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Default Basotect for damping BR-cabinet?!

hi guys,

since a few of you already know; I am working on my ATC SCM100 clone
(SCM100ASL Pro | ATC Loudspeakers)

It uses a 12" ATC bass in a ~100L cabinet and a 10cm dia port tuned to 30Hz.
Now I am wondering about the cabinets damping.

I have some Basotect over laying around and was wondering if thats a suitable material for damping a cabinet?
I know it's brilliant for acoustic treatment in rooms but not sure about cabinet and speaker design?

Any experience and/or suggestions?
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Old 6th March 2018, 11:54 PM   #2
xrk971 is offline xrk971  United States
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Basotect for damping BR-cabinet?!
Basotect is great stuff: reticulated open cell melamine foam. You can also find it as “magic eraser” home cleaning pads. I think it’s one of the best sound dampening materials you can use inside a speaker. I often use it directly beside or in back of a tight driver chamber to prevent reflections. If you have it, use it.
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Old 7th March 2018, 07:44 AM   #3
hugo stiglitz is offline hugo stiglitz  Germany
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wondering what thickness you'd recommend for basotect in a cabinet?
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Old 26th June 2018, 11:57 AM   #4
hugo stiglitz is offline hugo stiglitz  Germany
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It's been a while but now this project is about to finish.
Today I've worked on the damping and installed 8cm pyramid basotect in the cabinet. Behind that you'll find bitumen sheets.
In the upper compartment I will still install some polyster wool or the like.
The lower compartment won't show that, since it will have a BR-tube (see cut-out)

Do you think what I did is viable?
camphoto_758783491.jpg
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Old 26th June 2018, 11:35 PM   #5
GM is offline GM  United States
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No clue, but sure looks like overkill for a BR, so looking forward to some measured specs since the real ATC speaker specs a typical T/S max flat alignment, which normally requires very little damping assuming the box isn't too undersized for the driver's specs.

GM
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Old 27th June 2018, 02:22 AM   #6
RXV is offline RXV  Philippines
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Why is there a horizontal basotect foam in the middle? Wouldn't it block the flow/displacement of the total baffle volume (even if it is open cell) ? Unless this is intentional.
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Old 27th June 2018, 07:19 AM   #7
hugo stiglitz is offline hugo stiglitz  Germany
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Quote:
Originally Posted by RXV View Post
Why is there a horizontal basotect foam in the middle? Wouldn't it block the flow/displacement of the total baffle volume (even if it is open cell) ? Unless this is intentional.
1. its there because one quarter lambda

2. this is basotect. it is permeable to air as fas as I am aware
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Old 27th June 2018, 12:30 PM   #8
xrk971 is offline xrk971  United States
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Basotect for damping BR-cabinet?!
You can get 100 pieces of melamine sponge eraser pads for $5. Same material as Basotect.

Lots 100Pcs Magic Sponge Eraser Cleaning Melamine Multi-functional Foam Cleaner | eBay

They are a good size for many projects and useful for lining region directly adjacent to backside of driver around basket.

Regarding blocking middle of BR cabinet - a good idea to break up standing wave modes in a BR cabinet - just leave some room for air flow. It is permeable but has high flow losses due to tortuous path.
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Old 14th February 2019, 06:19 PM   #9
mbrennwa is offline mbrennwa  Switzerland
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Basotect for damping BR-cabinet?!
Quote:
Originally Posted by hugo stiglitz View Post
It's been a while but now this project is about to finish.
Today I've worked on the damping and installed 8cm pyramid basotect in the cabinet. Behind that you'll find bitumen sheets.
In the upper compartment I will still install some polyster wool or the like.
The lower compartment won't show that, since it will have a BR-tube (see cut-out)

Do you think what I did is viable?
Attachment 688875
I know this is an older thread, but I wonder about your experience with Basotect, as compared to the more conventional stuff like open-cell "egg" foam, or felt. Can you provide some insight? Would you use Basotect again, and do you prefer it over conventional foam or felt?
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Old 15th February 2019, 05:23 PM   #10
hugo stiglitz is offline hugo stiglitz  Germany
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Quote:
Originally Posted by mbrennwa View Post
I know this is an older thread, but I wonder about your experience with Basotect, as compared to the more conventional stuff like open-cell "egg" foam, or felt. Can you provide some insight? Would you use Basotect again, and do you prefer it over conventional foam or felt?
Hey,

I finished this project with the damping as shown in the picture above.
I even added a little basotect in the upper compartment left and right.
Further I filled the upper compartment with synthetic wool.
And I am more than happy with the result.
This is a very close clone to the ATC SCM100 A, hence a bass-reflex system.
What I really wanted to avoid is that boomy, inflated bass which I experienced in almost all other BR-system. My box almost remind me more of some closed cabinet designs.. Tight and linear bass but still with lots of headroom caused by the BR. I aimed for that effortlessness of BR-systems.
So I can report nothing but positive experience with basotect.
It might be more expensive than egg-foam but totally worth it.
I have to be fair and say that I didnt even try using egg-foam.
But I highly doubt that I would have gotten the same results.
By the way, I used thick pyramid basotect with 8cm thickness. (I wouldn't go any lower tbh)
I hope that helps.

Don't hesitate to ask if you've got any further questions,

cheers
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