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Second Skin Audio

need help designing box please,


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based my port cut out on dimensions listed here:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=268-352

based my tuning using PSP's own calculator here:

http://www.psp-inc.com/tools.html

I do not know the motor diameter so I simply based the depth using the entire diameter of the cutout to insure they would actually fit.

1.8 cubic feet after all displacement is taken into account

tuning is right around 37/38 HZ

please double check all math to insure i didn't miss something

6682465373_995edeb5e4_b.jpg

6682465405_7e85e5a48c_b.jpg

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If I remember correctly if you ran the port until it touched the back of the enclosure it would drop the tuning less then 1Hz, but if someone could double check that it would be much appreciated.

very much so appreciated.

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based my port cut out on dimensions listed here:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=268-352

based my tuning using PSP's own calculator here:

http://www.psp-inc.com/tools.html

I do not know the motor diameter so I simply based the depth using the entire diameter of the cutout to insure they would actually fit.

1.8 cubic feet after all displacement is taken into account

tuning is right around 37/38 HZ

please double check all math to insure i didn't miss something

6682465373_995edeb5e4_b.jpg

6682465405_7e85e5a48c_b.jpg

According to my calculations that box specs as follows:

Vb = 1.60710989 cu.ft

Fb = 34.7635301 Hz

Here are the details:

Individual driver displacement = 0.17 cu.ft

Wood thickness = 0.75 in

Port Diameter = 4 in

Port area = 12.566368 sq.in

Port lenght = 14.5 in

Port displacement = 194.144102 cu.in

Total driver displacement = 587.52 cu.in

External volume = 2.84505208 cu.ft

Gross internal volume = 2.05946181 cu.ft

The port considered is non flared type (flush mounted PVC Pipe). One other thing to consider is the clearance of the internal end of the port which is below the recommended 1 diameter minimun.

Edited by Joe X
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