Need help to identify a Sub and to build my first box

[appi]

daar krijg je niet veel meer voor hoor , is een oud subje

[ToNasty]

There not in anything right now. I pulled them out of my nissan hardbody. All i remember is i built a box that was. 75 cubes per sub. I dont have the box anymore. Just use a box calculator. And the sub displacement if im not mistaken is. 14