Volume Displacement Calculation
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 Multi-Way Conventional loudspeakers with crossovers

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 10th March 2007, 07:21 PM #1 lovitz   diyAudio Member   Join Date: Apr 2005 Location: Vancouver Volume Displacement Calculation How does one calculate the volume displacement of the driver in a vented enclosure? Bassbox Pro is giving me this option, but I can't find anything on how to calculate it. Thanks.
Svante
diyAudio Member

Join Date: Feb 2004
Location: Stockholm
Re: Volume Displacement Calculation

Quote:
 Originally posted by lovitz How does one calculate the volume displacement of the driver in a vented enclosure? Bassbox Pro is giving me this option, but I can't find anything on how to calculate it. Thanks.
I'm not sure I fully understans the question, but the volume displacement of the driver is always Sd*X, where X is the excursion of the cone (which is limited to Xmax).

The volume displacement of the system is larger around the helmholtz frequency, since most of the volume displacement is taken care of by the port. There is no simple formula that covers the entire frequency range for the system volume displacement as a function of driver excursion.
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 10th March 2007, 10:33 PM #3 Cal Weldon   Speakerholic diyAudio Moderator     Join Date: Jan 2004 Location: Near Vancouver Re: Volume Displacement Calculation or are you asking how much room the driver takes up in the box? __________________ planet10 needs your help: Let's help Ruth and Dave
 10th March 2007, 11:09 PM #4 lovitz   diyAudio Member   Join Date: Apr 2005 Location: Vancouver oh don't tell me it's that easy Cal....haha or is it?
 10th March 2007, 11:45 PM #5 Svante   diyAudio Member     Join Date: Feb 2004 Location: Stockholm Ah, so there is a box i bassbox to fill in the volume displacement of the driver, and you are wondering what to put there? Ok, could be that it is the room that the driver takes... Silly me. __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge
 11th March 2007, 12:52 AM #6 lovitz   diyAudio Member   Join Date: Apr 2005 Location: Vancouver I think your right. I saw volume and liters and thought it was something different. So all I have to do is convert millimeters to liters for that value?? Thanks again guys!

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