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Old 15th August 2010, 08:11 AM   #11
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Join Date: Feb 2004
Location: Caen - France
Quote:
Originally Posted by orjan View Post
Hi,

From Baxendall's chapter in Loudspeaker and Headfone Handbook, the polarized resonance frequency is for bass panel 70 Hz and treble 260 Hz.

/örjan
Here are the results of my first measurements:

Picasa Web Albums - fabien.lefebvre.fr

With a comparison between the rebuilt panel and another assumed in original conditions (needs to be re-built), approximately in the same measurement conditions.

I have been using these weights: 28 * 1.5lbs on an area in the vicinity of 85*45cm.
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Last edited by Fabien Lefebvre; 15th August 2010 at 08:38 AM.
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Old 21st September 2010, 09:24 PM   #12
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Join Date: Feb 2004
Location: Caen - France
Quote:
Originally Posted by orjan View Post
Hi,

From Baxendall's chapter in Loudspeaker and Headfone Handbook, the polarized resonance frequency is for bass panel 70 Hz and treble 260 Hz.

/örjan
Now that I have seriously studied this book, no doubt that this is really the reference to read: it simply contains the only un-questionable frequency response plot that I am aware of.

By the way, my measurement is not precise enough (too averaged) because it does not show where happens the first peak above 10kHz, which is a key information to check that correct tension was applied on treble panel.
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Last edited by Fabien Lefebvre; 21st September 2010 at 09:27 PM.
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Old 26th September 2010, 05:40 PM   #13
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Quote:
Originally Posted by Fabien Lefebvre View Post
Here are the results of my first measurements:

Picasa Web Albums - fabien.lefebvre.fr
Any advise: keep 1.5lbs per weight, increase to 1.75, 2lbs ?
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