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Old 9th April 2010, 06:34 AM   #11
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Great, a reference. Could you please give more info?? Thanks.

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Research that Toole shows in his recent book, show that low Q resonances are more audiable than high Q ones.
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Old 9th April 2010, 06:58 AM   #12
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Great, a reference. Could you please give more info?? Thanks.
Amazon.com: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (9780240520094): Floyd Toole: Books

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Old 9th April 2010, 07:51 AM   #13
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Thanks, looks like a book to buy.

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Old 9th April 2010, 08:26 AM   #14
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Thanks for clarifying. I'm not meaning to offend, but your replies seem to be a little terse.

Are you able to share any of the results for the Pensil series enclosures? I'm sure I'm not the only one who would find the data informative.



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I thot it was pretty clear. Yes we test for resonances.

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Old 9th April 2010, 08:33 AM   #15
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We've not built a set of Pensils.

The format of the current data is not very sharable, You'll have to come by. You bring the Ozzie beer.

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Old 9th April 2010, 09:42 PM   #16
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Now if you were just down the road I'd definitely take you up on that. In fact I have an Ozzie beer in the fridge, but NZ beer is infinitely better!

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We've not built a set of Pensils.

The format of the current data is not very sharable, You'll have to come by. You bring the Ozzie beer.

dave
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Old 9th April 2010, 09:49 PM   #17
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Looks like google miht have something to offer on the acoustic properties of wood.

Google search on wood and resonance
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Old 9th April 2010, 10:10 PM   #18
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I'll stick to my Hobgoblin...

There is plenty of data you can search on acoustical properties of different woods; there's no lack of it. Being a natural & variable product however, you can only really take it as very general indications.
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Old 9th April 2010, 10:37 PM   #19
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And some hard data from Wilson Audio...

Spectrum Analysis of various materials
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Old 10th April 2010, 08:47 AM   #20
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I'm trying to expand my knowledge here, and its directly related to a build of cabinets you designed for the Alpair 7. So far I've only got reluctant interaction from you guys. I was about to add this link to the discussion as it adds the sort of data I'm interested in...

Lowering Mechanical Noise Floor in Speakers Pt 2 — Reviews and News from Audioholics

Do you guys really have no spectrum data like this?

By all means spin this off into a separate thread, but I hope it might develop and add understanding that will enable the maximum to be extracted from Mark's Alpair drivers, and the cabinets designed for us to use with them.

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