Anything wrong with this box

[SLIM3001]

Hi guy i made this box up for a friend for a 12 inch JBL sub can you tell me if you see anything wrong with it thanks. As he is saying it dont look right to him ?
PLEASE NOTE pic is to show how to make the box so not to size IE port placement

http://img459.imageshack.us/img459/1495/jblua1.jpg

Cut list

Color Count Width Height
Top and Bottom Gray 2 x 24 inches 24.5 inches
Red 1 x 20.5 inches 13.5 inches
Yellow 1 x 23.75 inches 13.5 inches
Pink 1 x 22.5 inches 13.5 inches
Green 1 x 24.5 inches 13.5 inches
Deep Sky Blue 2 x 20.25 inches 13.5 inches

[SLIM3001]

bump

[rpfuror]

I get just with the basic numbers more like 20 Hz tuning based on a 3" port.

What did the designer tell you about the box?

[SLIM3001]

Hi m8 i made the box for a friend but he is saying the port's dont fit when thay should do ?

[rpfuror]

hmm... the ports don't fit? The numbers are right, just doesn't look like the tuning it even close. What specifically are you looking to do?

[SLIM3001]

just a box to fit a 12 inch jbl sub tuned to 27hz.

What you think to this

Box
15 x 35 x 16 external

port 13.5 x 2 x 30

[rpfuror]

THat design equal ~

Net Volume: 3.15 cu/ft
Tuning Freq: 25.94 Hz

That's closer, but I would go with a little more port area.