Lol yes it is possible to do. Only other way is to build a custom box you will have to look up online to see what the dimension you would have to build the box so the speaker will have the right amount of air, an the right amount of space to put it inside. :/ it's going to be some work but it will be well worth it..
What kinda amp are you going to use for this?
---------- Post added at 10:57 PM ---------- Previous post was at 10:55 PM ----------
Try building the box long ways so you can keep the right amount of air in it.