Model made in Tinkercad.

WADDA WSAH8098/Velleman 8098 Audio Analyser Box to house completed kit, mounting holes left blank so you have choice of threaded inserts, screws or glue, room under kit for power jack and banana plug sockets for signal/power, or adjust hight for a lower profile fit.

Dimensions:

Length=98mm

Width=52mm

Depth=50mm

2mm walls 30% or more infill, depending on final panel fixing method.

Maybe resizable for other projects.