PA stands for "public address", and refers to loudspeakers and their power supply. A powered PA system, means that the loudspeakers' power supply, or amplifier is fitted into the the speaker-box itself. These loudspeaker designs are also referred to as active speakers.
PA systems are used for live broadcast applications such as bands and DJ sets, and designed to run louder for longer periods of time compared to studio monitors. Sounds Easy carry a range of brands from QSC, Mackie and more. Contact us for more info.