6" Jenson Iso cab

[kip4]

So I have a Jenson CH6/15 speaker.
I'd like to build an iso cab for my small studio.
But I'm stuck to know what size to build it.
I'll be using an sm57 on a gooseneck for micing.
I have rockwool left over from room treatment.
I note that the axe trax has a protection fuse for example too.
How would I impliment such a thing into my design too.

Suggestions welcome
Thanks guys

 

[Btyre2013]

personally I'd build one out of MDF and pegboard, with air gaps, and rockwool, you could also use plywood too, I don't have a design though, just throwing out ideas here.