As for teh impendence, its dual 2. The box in the picture is 2.25 cubes sealed. I can give you the grill if you buy it for free...a $21.00 value! Anyway...The repair turned out great. I would keep the sub if I wasnt going to buy a new mag....but i'm upgrading. The avalanche 18 vs. Brahma? The avalanche is sealed with about 6-7 cubes, (not mine)and my brahma is now ported with 4.5 cubes net to 32 Hz. Of course my brahma is louder, but that just because the box and setup...anyway....offers?