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Multi-Way Conventional loudspeakers with crossovers

MDF vs. particleboard
MDF vs. particleboard
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Old 22nd May 2006, 07:26 AM   #11
arjscott is offline arjscott  New Zealand
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Any idea what the document writer means by "strengthening". For example graph 9 "18 mm MDF with strengthening".

It might be somewhere in the document, sorry if I missed it. The babelfish translation wasn't that great.

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Old 22nd May 2006, 08:47 AM   #12
Rademakers is offline Rademakers  Netherlands
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The strengthening is the bracing, you see on the picture of the test cabinet in front of the speaker. It has a length of 40 cm and I think it's 18 mm MDF x 8 cm (not documented).

With kind regards Johan
Impossibilities we do immediatly, miracles take slightly longer.
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Old 22nd May 2006, 02:36 PM   #13
lndm is offline lndm  Australia
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Concrete numbers or facts? not so sure. I think bare plywood 'sings' more than bare MDF but the plywood is easier to live with. The numbers would betray my feelings on the issue.

If you are going to carefully brace and damp the panels then the issue moves toward becoming moot.
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Old 22nd May 2006, 03:12 PM   #14
forr is offline forr  France
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Bending of the cabinet may be an issue but weight is an other one, probably as important, especially for the rear panel. To avoid the box to be moved by action and reaction, the better would be to have two units mounted on two opposed panels.
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Old 22nd May 2006, 06:08 PM   #15
thylantyr is offline thylantyr  United States
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MDF vs. particleboard

You can analyze the materials and form conclusions. For
speaker box building you can use many materials as long
as you design accordingly to offset any weakness and you have
to determine if the design can be executed with said materials.
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Old 22nd May 2006, 06:16 PM   #16
dnsey is offline dnsey  United Kingdom
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MDF, particle board and ply all come in a wide range of qualities. Take the best variety of any one, and it will outperform poor examples of the others. For example, I like using high density 'flooring grade' particle board (and yes, it does machine well with a router), but wouldn't consider the 'crumbly' stuff for serious construction of anything.
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Old 23rd May 2006, 12:42 AM   #17
lndm is offline lndm  Australia
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In order for numbers to work, we would need to make some assumptions. Like for example, that the only issue is how much noise the panels produce.

Decades ago, cabinets were expected to make noise, and manufacturers would put efforts towards how they would sound.

If I didn't misread, Nelson Pass suggested a preference for a 'live' cabinet. I can't find the posts in the search system just now to be sure. I think it suggests there is more than just quantity of resonance to consider. (BTW IIRC, these posts were not about subwoofers, but FWIW).
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