Thanks Lightyear but my friend "Woodworker Jay" actually built the 5 sided box to my specs. Finger joints would have looked cool but I would have felt bad covering it up with Dura-tex.
I'm loosely copying the Mesa 2x15. I had the cabinet tuned for the Eminence Kappa speakers so it's not as deep.
I love the sound of 2 15s but I hate moving two cabinets and a two wheel dolly. I figured maybe I could make one and I knew Jay could help.
I got the holes cut for the casters, back plate, recessed handles and I started bracing. Need to do some fine tuning and get the baffle ready next.