Box questions

[06 Scion xB 0]

I am getting ready to make a box and need to know two things. I am building a box for a nightshade 12 and I got an aeroport. The box is going to be sub up port on the side

1) Can the port be inside like old times? The only reason I am asking is all I see nowadays with aeroports is crx style with ports out of box. Will I lose db's by putting port in instead of out?

2) If so how many cubes roughly would it take up?

Port will be 15.5 inches long and its a 4 inch aeroport. I am trying to see what I need to make dimensions of box if port is in instead of out. I just want the best possible setup I can get for what equipment I have.

[Juslivin 1]

You can put the port inside. Many people still do. I believe more than they put them on the outside but idk.

Not sure about the 2nd part of your question or your 2nd question.