QSC KW122 speaker. 1000 watt, premium quality sound system speakers. Generally, 2 are used for main event room, and 2 are used for a wedding ceremony, cocktail hour, or any other remote need. These can also be operated wirelessly, with music being transmitted from the main DJ setup to the remote location of the second pair of speakers. However, for larger events, such as outdoors festivals, all 4 can be used together to create a very powerful sound system only needed for very large spaces (i.e. 500 people or more).