for dave
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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=94530
Printed Date: May 13, 2025 at 11:24 AM
Topic: for dave
Posted By: stevdart
Subject: for dave
Date Posted: June 05, 2007 at 7:49 AM
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 
)
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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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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
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...
Those are the parameters I used in JBL Speakershop
That's the first plot, with cabin gain assumed.
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."
Those are the parameters I used in JBL Speakershop
That's the first plot, with cabin gain assumed.
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...
-------------
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."