Stay away from these home systems for stage work. They are not made to travel well, and although they pump out some good solid bottom, they don't project well.
The wires are flimsy, and they just aren;t made for the peaks that are possible with live music.

In the right hands, anything can be made to sound OK, but I still advise against using home gear on stage. Nursing homes, maybe ....... but then again - the key word there is HOME, isn;t it?