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for dave

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Forum Name: Miscellaneous - Off Topic
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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=94530
Printed Date: May 14, 2024 at 3:17 PM


Topic: for dave

Posted By: stevdart
Subject: for dave
Date Posted: June 05, 2007 at 7:49 AM

tcparam.jpg

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.



Replies:

Posted By: haemphyst
Date Posted: June 05, 2007 at 7:58 AM
Thanks, Man! Still weird, tho... I'll break it down for ya! You have PM... (If not right now, soon posted_image )

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."




Posted By: stevdart
Date Posted: June 05, 2007 at 9:08 PM
tcspl400wwithfilters.jpg

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: haemphyst
Date Posted: June 05, 2007 at 11:50 PM
Tell me if these look about like what you are seeing, in WinISD...

posted_image
Those are the parameters I used in JBL Speakershop

posted_image
That's the first plot, with cabin gain assumed.

posted_image
And here is what the power and impedance plots look like... (lower right graphs)

Do these seem possible at all? Note the vent is area, not round... I can still safely assume a vent velocity of .06M, which should be pretty damn silent. I know there is a horrendous peak, but I'd rather have a peak than a dip! Note there are no filters applied here, JBL doesn't have the capabilities for that, but I will be applying a subsonic @ (around) 23Hz, and a low-pass no higher than 55Hz. This IS a tough driver to model...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."





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