OK, well without exact port dimensions there is no way for any of us to tell you what your current enclosure port tuning is... I can tell you that by your given external dimensions from an earlier post (34x16x13); you should have about 3.14^ft. gross (That's if it is built from .75" material) As for the subs... You don't have much power at all to work with and being that you're NOT planning on having the proper enclosure built, results will vary & be mediocre at best...