how do you do interchangeable ports?

[crfrider 10+ year member]

a yes how would I go about doing a interchangeable port, i want to do like 32-35 hz for everyday, then do a like 40-45hz for spl? how would i go about doing a interchangeable port? I was wanting to do a slot port so how can i do that, which tune would be a bigger port, then would i just slide in a smaller port into the slot? any help would be great thanks

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[Buck 5,000+ posts]

You make a port in which you can take out. Lower tuning would be either a longer port or a smaller one.

 

[crfrider 10+ year member]

well how would i do a slot port that i can take out

 

[SW9152 10+ year member]

Have you considered circular aero ports? those would be easy to make different length tubes.

 

[mbrooky 10+ year member]

well the slot would be more of a rectangle port...just make the cutout larger to accomodate the port, slide it in and bolt it down....say your spl or higher tuned port is 4wx10tall" 5" long and your daily low end port is 4x10" 12"long. make a rectangle that's 8x14...to leave a little overhang so you can bolt to the box...and cutout a hole centered that's 4x10. then make your port walls...example is 5" long, take into account of the .75 from the top plate and each piece would be 4.25 long....then the same for the low end port.....then since this one is 4x10 you would cut a hole in the box that is 4.75x10.75 to slide in the port( assuming you are using 3/4 wood)...then screw it to the box.....make sense????

square port i made out of birch attached that was 8x8, i made one for daily and one for comps.

 

[DammitJames 10+ year member]

if you want i can take some pics of mine to kinda show you what you will be dealing with i cant take the port out at the moment but it will give you an idea to what the end product is

 

[crfrider 10+ year member]

thanks guys for the help i think i under stand so the length of the port makes the different tunes? yea twoeggcustoms take some pics if you dont mind well im not failiar with areo ports it seems that it would be easier to change but i dont want ports sticking out

 

[mbrooky 10+ year member]

use this as a guide: Subwoofer Enclosure Calculators, Fraction to Decimal, Parallel, Series, Port Length and Volume Calculators

scroll down and use the "slot port length calculator" For my example above I put in Port Width-4 Port Height-10 and box volume- 6cubes tuning 32 = roughly 12" and change tuning to 40hz= 6"

hope it helps. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[DammitJames 10+ year member]

youll have to ignore the extra sheet of wood i got there one of my 10s is out of commission so i grabbed the first peice of mdf i had and covered it up... then the duct tape is for decoration //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif had a little water leak lol

not guna take it out right now unless you really have to see it... but the bolts you see come out and the port slides out i have my 50hz port at the other house the one in there right now is 35hz box is double baffled you can see where the baffle ends and the port begins...

btw if he is still running around here i didnt make this box so ill give credit where its due.... Cannon White built it and it is one of the best boxes ive used...//content.invisioncic.com/y282845/emoticons/toast.gif.bc0657bf54b9ee653b6438524461341e.gif

 

[DammitJames 10+ year member]

figured i might as well show the rest of it too //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

box is 6.5 cubes with 2 3/4" steel braces and fiberglass resin on the inside made for 3 10s for a truck but i got a good deal on the subs and the box came with so... previous owner is a good friend of mine

 

[AQHDC3 10+ year member]

Here is a pic of mine to give you another idea:

 

[rosshimself13 10+ year member]

sorry for the off topic post but twoegg, what vehicle is that box in?

 

[twistedchild420 5,000+ posts]

Aero's are the easiest way brah

 

[DammitJames 10+ year member]

sorry for the off topic post but twoegg, what vehicle is that box in?

that would be in my 91 jetta why?

 

[rosshimself13 10+ year member]

im an idiot... thats why, it looked like the back seat of my truck i the last picture you posted...