Room filling Mackie desktop speakers with sub woofer

I bought this Mackie system earlier this year from the RockShop in Christchurch. My intention was to use this as a monitor system for fold back with my keyboard. I have never used them as I decided to go for in ear monitors (I.E.M. s) instead. They have only been taken out of the boxes to test and never used live. So they are new. I originally just bought the cubes but they were a bit wimpy on their own. Then I added the sub and the whole system came alive. The title is true - they really do fill the room with sound including great bass. I believe that this system with an added mixer could be used as a PA for a solo or duo act in small venues. I can deliver anywhere between Christchurch and Timaru.