this is what i came up with. what do you think?he wanted it tuned kinda low. it is for a dd9518f on a xta-4000d at 1ohm.
btw- i am not an artist and don't know how to do the fancy stuff on a computer. this sketch will have to give you an idea.
edit- this is single layer all around. the top will be double layer for a true height of 17"