Martin J King's vented speaker spreadsheet

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Ilianh

Ilianh

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Joined 2002
#1
I was going to email him, them I thought that this could be usefull for others.

I wanted to know if the volume of the port is taken into account in the final box volume when calculating a speaker.

I tried figuring it out looking at the spreadsheet whitout any results.
 
#2
Ilianh said:
I was going to email him, them I thought that this could be usefull for others.

I wanted to know if the volume of the port is taken into account in the final box volume when calculating a speaker.

I tried figuring it out looking at the spreadsheet whitout any results.
Click to expand...

Sorry, I don't have your answer, but I do have a question. 🙂

Is this an Excel spreadsheet, or does it require MathCad? If it's an Excel spreadsheet, where can I find it?

Thanks.
 
#3
Hi Ilianh,

No, the volume of the port is not accounted for in the internal volume of the box. The worksheet "thinks" that the port extends outside the box. If you wanted to get really precise, I guess you could model the individual sections so that the section just before the port and just after the port had a reduced area to account for the port's volume.

Hope that helps,
 
#5
MJK said:
Sorry Dave. It is another MathCad worksheet, I don't work in Excel (I hate spreadsheets!). MathCad is a great package. Last years version can be picked up at a great discount on Ebay.
Click to expand...

What version should I be looking for? There are a lot of ads for academic versions. I suppose that's not what you are refering to.
 
#8
MJK said:
I would look for MathCad 2000 as a minimum. I personally like 2000 better then 2001 or 2001i. An academic version should also work fine. MathCad 2000 runs on 98 through XP without any problems, I have done it.
Click to expand...

Thanks. I'll give it a try. I'm running Windows 2000. MathCad 2000 should work -- riiiight? 🙂
 
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