Port Help!!

[GohillaAudio]

ok, say i have a enclosure that is 32x32x14 and want to add a removable port, what size/length would said port have to be to tune the enclsure to 36hz?

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[skmfkr 5,000+ posts]

http://www.bcae1.com/spboxnew2.htm

http://www.carstereo.com/help/Articles.cfm?id=31

 

[mrogowski 5,000+ posts]

An approximation is 115 square inches of port 8 inches long.

 

[GohillaAudio]

hmmm...... it says that for my box that is: 6.72 cu. ft. only needs a port of 6" tall by 12" wide and 15.25" long to obtain a port tuning of 36hz......that doesnt seem right to me.....what do you guys think?

 

[GohillaAudio]

bump

 

[mrogowski 5,000+ posts]

Whoops - my bad. I calculated using 42" and not 32" - sorry about that //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Your total gross volume is 8.3 cubes

Power input will determine overall mach speed of your port, so I used an arbitrary number of 1000 watts.

Port volume takes about 1 cube, so your net volume is 7.3 cubes. You can round that off to 7 cubes taking driver and bracing displacement into account.

So, is you use 88 square inches of port 18.5 inches long you will be fine.

 

[GohillaAudio]

im uber tired right now, what does that come out to in port size?

 

[GohillaAudio]

oh, and thanks btw

 

[mrogowski 5,000+ posts]

Hmm... Well, you can calculate it to whatever dimension you wish. However, if the dimensions you gave equate to length = 32" and width = 32", then you can do a slot port 2.75" x 32" x 18.5" deep.