port length help

[flawse]

This is the first box I will have designed and built, have been out of audio for awhile. Building a box for 2 DC level 4 18s, per the specs ive come up with the port needs to be 24in long/deep whatever, it is 22 tall 7 wide 24 long. the box itself is 24 deep so i obviously need to L the port, so i would go 17 inches deep and then L the port. it is a middle port so the question is do I go 17 deep and then L 7 inches on both side or would I do 3.5 inches both sides for a total of 24? Maybe i am over thinking this lmao but any advice would be appreciated. shitty picture of what im talking about below

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[1aespinoza 10+ year member]

Maybe i am over thinking this lmao but any advice would be appreciated. shitty picture of what im talking about below

Are these the combined specs of both subs? If yes, I assume you would have to split the width on the remaining 7 inches but keep the length. That way each sub will have the 24 inch length, but it will have the 22h x 3.5w required of each one. So the back wall port would be 22h x 3.5w x 7l.
My recommendation would be to put a wall down the center to split the port and take the guess work out of the equation.

 

[flawse]

Are these the combined specs of both subs? If yes, I assume you would have to split the width on the remaining 7 inches but keep the length. That way each sub will have the 24 inch length, but it will have the 22h x 3.5w required of each one. So the back wall port would be 22h x 3.5w x 7l.
My recommendation would be to put a wall down the center to split the port and take the guess work out of the equation.

I see now that you cut the width in half at the bend if I were to keep it one port, I didn’t know that before. I appreciate it

 

[hispls 5,000+ posts]

I'd have the internal port end 7" away from the back wall and just roundover that corner. That back (rounded) wall should effectively extend the port depth by half a port width putting you right around on target. Double up material on the internal port wall round it over on both sides and I think tuning will about hit your target.