I have a Bagend 2x12 cabinet. In the cabinet there is a diagional piece of ply wood (not totally deviding the cabinet in two) between the baffle and the back. This way the cabinet is incredibly sturdy and will have a very controlled low end at high volumes. My 2x12 has the dimensions of a Fender 2x12 combo but is about 5cm taller and 3cm deeper. It is a closed design.