In order to ensure that the cabinet walls are sturdy enough, we have used 22 mm boards. Simply glue the boards together (butt-jointed).
The drivers have been recessed to provide optimum appearance. If you prefer to do without the time-consuming manufacture of the recess, the driver and radiator can be screwed directly to the front of the cabinet.

Distribute the 2 mats of damping material uniformly throughout the cabinet.