Speaker wall shelf (yet another)

Short history: I wanted a plain and basic shelf for my speakers with some type of cable management. As the dimension of the speakers is large (_160mm x 110mm_) I couldn't find any existing model that could fit so I launched FreeCAD and designed one for that purpose.

I uploaded the FCStd file (_FreeCAD_) for both versions so anyone can open and modify it directly if necessary. My designer skills are very basic, but the design itself meet my requirements.
If someone want the file exported to another type, please let me know.