I can't understand why anyone would use a speaker like this and not protect it as well as possible. This is what this cover does. It has protected my speaker from broken glass, dropped equipment and spilled drinks. The cover itself brushes or wipes clean.
There is a small slot for the speaker's handle to stick through, which makes moving the speaker as easy as if the cover wasn't there.
A much as the cover is protective, it is also very flexible; once I have set up my equipment for a show, I can fold it up and hide it in other larger cases.
A worthwhile investment, and much neater than using duct tape and cardboard!