Dayton RS150P-8 port lenght?

[jkthn]

i am building a new more advanced center speaker,but i am very unsure if my calculations about the port dimensions and the lenght!
I have 2 piece of dayton rs 150p-8 drivers,and 32 liters volume(without drivers calculated)
What can you recommend?
2"? 3" and ?

 

[planet10]

You do not want a side-ways MTM for a centre.

dave

 

[GM]

Hmm, a T/S max flat alignment is ~9.44 L, 56.6 Hz Fb, so dual = 18.88 L, leaving lots/too much? room left over, ergo will need to experiment with solid 'stuffing' to make the dual 2.5" dia x 10.125" long vents be correctly tuned.

 

[jkthn]

Hmm, a T/S max flat alignment is ~9.44 L, 56.6 Hz Fb, so dual = 18.88 L, leaving lots/too much? room left over, ergo will need to experiment with solid 'stuffing' to make the dual 2.5" dia x 10.125" long vents be correctly tuned.

I was thinking that the drivers and the ports are taking alot of space,that is why i build a 32l box,but maybe little too big,my thought is that it is better with bigger than smaller box.
I am not good in writing,i am from sweden 🙂

 

[GM]

Well, either you or some translator program is doing just fine. 😉
A good plan that I always adhered to since it's a lot easier to 'shrink' a box than enlarge it.

 

[jkthn]

Well, either you or some translator program is doing just fine. 😉
A good plan that I always adhered to since it's a lot easier to 'shrink' a box than enlarge it.

Ok,if i have these port lenghts and size that you wrote to me,how too count volume that speaker and port will take ?
18.88l + speaker port volume? or is it not nessesary to count this? just a thought 🙂

 

[PRR]

how too count volume that speaker and port will take ?

Look in your geometry school-book. Formula for cylinder is simple. That will figure your magnet and your ports. The speaker frame is usually too thin to matter. The speaker cone is approximately a cone, so 1/3rd the volume of a cylinder with the same base (across the cone, not the frame).
https://www.flocabulary.com/unit/volume-cone-cylinder-sphere/

 

[GM]

Right, think of the vent tube as a solid cylinder since it has its own trapped air.