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Old 15th January 2010, 08:21 PM   #1
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Default Port size and length?

Im not sure if i can just give you the specs on the driver and then help me figure out port size from that or not but speaker specs are:

Re .975/3.9 (dvc 2 ohm)
Fs 19hz
Qes .271
Qms 4.59
Qts .256
Vas 143 litres
xmax 13.5 mm
spl 90.2 db

I have a box from a past project that is about 3 cu ft (subtracting driver volume already done). Is there any way I can mount these two drivers in this box (its sealed right now) then cut and install a port to make these drivers work with 1.5 cu ft of volume for each driver?

Any help or comments appreciated...

Thanks
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Old 18th January 2010, 04:25 AM   #2
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download Winisd or Unibox for free, they'll both do the calcs for you
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 18th January 2010, 12:02 PM   #3
Ron E is offline Ron E  United States
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http://www.imagedynamicsusa.com/pdf/...%20D2%20V2.pdf
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Old 18th January 2010, 01:14 PM   #4
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by derekwwww View Post

I have a box from a past project that is about 3 cu ft (subtracting driver volume already done).

Is there any way I can mount these two drivers in this box (its sealed right now)

then cut and install a port to make these drivers work with 1.5 cu ft of volume for each driver?

Any help or comments appreciated...

Thanks
Your box seems perfect fore two of those woofers, if it stays closed

Porting results in either a too small or too long port
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Old 25th January 2010, 06:39 AM   #5
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Er, you didn't give Sd or say what size woofers these are...

And, what's the brand & model #?
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