I need a common chamber box plan

[john253a]

You need to atleast double the face, and brave the hell out of it,

Or your wish you had, when your rebuilding it in an few months,

Idd do

2 1"dowel front to back

1 side to side at back of port

2 inside port side to side

1 on each side to port wall

And 2 top to bottom( 1 each side)

[Kolbyab1294]

I planned on bracing top to bottom left to right I did the calculator on my cousins computer and all seemed right I don't quite understand an no one gave me an answer

If you have the air spac correct and your frequency is right isn't that what matters?

[Kolbyab1294]

Ok this was my plans

2" face

3/4 every wear else

Two 2" braces top to bottom

Two 2" braces side to side

Two 2" braces front to back

I need one in the port ?

My original plan I had the box 22.5 deep

But I gave second thought and wanted a big front

So it would have been a little different but it wouldn't have changed internal

Why couldn't I do 10*10*4.09 something like that my port length was and I can get the port length perfect all the way up to 12x24 peice of wood I have a laser marker at my work

I keep getting told my port isn't good enough but no one has helped me in telling me why

[john253a]

Your port need to match the type of sub you have,

The 15" you have require 50-60sq" each so 200-240sq" for 4

You can run a smaller port but there is a possible of port noise and less output(the primary reason for a wall)

[Jessica]

ok, what is the "minimum" air space the subs allow for ported. Looks like you may have to go aero port to get the port area you want. Also, everyone is recommending more port area because too little can cause port noise and other issues. Port area is as critical as the volume your subs are in because the air in the port moves back and forth and helps control cone movement as well as how the box sounds.

If you go 3/4" for the outer shell of the box you will need mode bracing. I'll leave it up to you to convince everyone to design a box with that option. But remember, you did ask for help and you are getting it. Sometimes we have to sacrifice a little to get what we want.

[john253a]

With 3/4 all round you can get more port then you need,

2" front isn't nessercerly 1.5" is good enough,

Your only as strong as your weakest piece,

If you use square for bracing you need to round the edges,

As for brace in port if you run top to floor at 7" you'll need it, some just use 3/4 mdf down the centre splitting top from bottom, NOT left to right

[Kolbyab1294]

Aero ports sound terrible ...

My personal opion I've allways heard a noise that I dislike I appreciate the help I'm sorry if I seem un grateful if I knew who y'all was I'd pay you for your time

[Kolbyab1294]

John 253a

I know it's not to big but when I post my build can I mention your name with a great amount of special thanks

[Kolbyab1294]

With 3/4 all round you can get more port then you need,

2" front isn't nessercerly 1.5" is good enough,

Your only as strong as your weakest piece,

If you use square for bracing you need to round the edges,

As for brace in port if you run top to floor at 7" you'll need it, some just use 3/4 mdf down the centre splitting top from bottom, NOT left to right

So you are saying throw out square port and do huge slot port ?

And 3/4 mdf down The center all the way to the back of box as in separating the two set of subs ?

[Miguels]

why not do 4 12's?