Quick & Easy Question about box design

[rickyfromthe407]

Alright heres a quick question for you guys!

Looking into building my first Ported box, and I have a few last questions, but only looking for one answer here.

I am looking at the box recommendations for my subs ( I have 4 Memphis Mojo M3 10"s )

They say the optional air space for

1 sub in a vented box is 1.5/36/10.5 x 1 x 16

( Airspace/Tuning/Port Dimensions- Height x Width x Depth )

2 subs in a vented box is 2.40/36/10.5 x 1.5 x 14.5

My question comes to the port... The notes of the sheet say "Box designs are total internal airspace, including port/drive displacement."

The Driver Displacement of my subs I cant be 100% sure but I remember when I built my sealed box that it was like .062cf

So in question, what do they mean by PORT displacement, do they just mean how much airspace the PHYSICAL wood takes up, say a 10.5" x 1.5" x 14.5" a piece of MDF this size takes up 114cubic inches. So make the box 114cubic inches bigger.

Or

Are they saying the total space the port takes up meaning even the air space inside the port. Which comes out to I don't know 228cubic inches? Or are they talking about the space of the MDF used to make the port which id guess is around 146cubic inches?

Ahh this is so confusing...

SMH. Any Help is appreciated, or if you know anybody who can drum up box designs w/ exact measurements clearly drawn out?(:

Thanks Guys for any replies!

**On a side note - I was going to make 2 ported boxes at this 2.4cf ; Unless I could figure out the math two just make one big box and put a MDF wall divider and make it two separate sides. at 2.4cf each to possibly save some trunk space. As I am working with basically 5.2cf of space. **

Thanks Again

Link to an image w/ the specs I was talking about, could be easier to understand.

http://i113.photobucket.com/albums/n204/ricky400082/box_dimensions.jpg

[412 CVX]

assume the port was one solid piece of wood. no hole in the middle. i believe they're asking for what that displacement would be

[rickyfromthe407]

assume the port was one solid piece of wood. no hole in the middle. i believe they're asking for what that displacement would be

So the way I figure. Make the box roughly 230cubic inches bigger to compensate for port/driver displacement?

Sounds logically easy!

I appreciate the response bro!

**EDIT** 228cubic inches for the PORT DISPLACEMENT plus another 108cubic inches for DRIVER DISPLACEMENT

Meaning make the box roughly 337cubic inches bigger than 2.4cf

I think I got this...