Turntables, CD players and digital music are the most common sources for DJ music. A typical small bar will either utilize a dual CD player or computerized digital setup. Utilizing a dual CD player in conjunction with a computerized digital setup can offer wide flexibility.
A basic four-channel mixer is a typical choice for most small bars. The mixer processes the source music, and allows for the back and forth bridging of dual sources as well as providing controls for vocal microphones or video and auxiliary feeds. Karaoke, dance music and even some live music can be run in a small bar with a four-channel mixer.
A power amplifier will provide the juice to pump the source sound through the speakers. Two full-range speaker cabinets can provide ample sound for small bars without the need for a separate subwoofer. Powered speaker systems can eliminate the need for a separate power amplifier as well as provide a compact design with plenty of punch.