Slot Port Opening

[07BronzeFuz 10+ year member]

does it matter how wide the slot port is. I am looking at a box 35x15x16. With a slot port of 2.5 inches wide its about 33.75 tuned to 35 hz. A opening 3" wide is tuned to 37.6 with 40.5 sq inches of port. Whats the general rule on the width of a port without getting port noise. Also if i wanted to use a 4" pvc is says it will be 4.9 inches long for 35 hz. I would think that would not be enough for a single driver and be very high tuned. Thanks

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[dappa5 10+ year member]

slot port rule of thumb = 12-16 in^2 per ft^3

 

[mmouse57 10+ year member]

make sure to include port and subwoofer placement in your box

so if 35x15x16 is what your subs need you will need to make it bigger //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[dappa5 10+ year member]

make sure to include port and subwoofer placement in your box
so if 35x15x16 is what your subs need you will need to make it bigger //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

lmao did you mean displacement??

lol gotcha b-4 edit lol

 

[07BronzeFuz 10+ year member]

yea, displacement. With my box 35x15x16 and a slot port opening 3" 13.5" long It gives me the proper hz i am looing for. Do I have to make a 90 degree turn, or can the port just be straight going toward the back of the box. If I turn the port 90 degree the hz go way down. I was trying to get 35-37ish