Active PA speakers come loaded with an inbuilt amplifier stage meaning they don't need a power amp. You can use one active speaker by itself or simply daisy chain more cabs together for a bigger setup.
Active speakers offer superior performance over their traditional passive counterparts since the internal amp stages are matched to drivers, in addition their active crossovers are far more efficient than passive networks. So if an Active PA Speaker is what you're looking for then look no further. Here at Sounds Live we stock a massive range of Active PA Speakers from RCF, Mackie, Db technologies, and many more!