I am planning to do a box that I have never seen before.
This is still being planned, but my physics proffesor came up with the idea.
Initially, I came up with the idea to put regular egg cartons inside of the box, but she said that has been done already, so she suggested to put half circle soft rubber balls (about 28) to absorb and deflect sound everywhere in Chamber 1. In Chamber 2, the plan is to put a row of "reflectors" to push the sound back and forth, thus filtering the sound equally into four "deflectors" that are to push the sound back into the reflectors until it reaches Chamber 3, in which there in no interference.. It might seem crazy, but coming from a woman majoring in physics, I think she has the right idea. Even more importantly, this will count on my finals for the class. It will not be so much scientific, but my class will listen to one enclosure using the approximate measurements with no modifications and the enclosure I am making (also with the same dimensions, minus modifications), all with the same subwoofer.
Here's the very very rough draft
If you think it will work or has any ideas on how to make it better, reply to this post.