Four channels mean more input ports, DJ performance functions, and mixer FX. The components needed to provide all this extra functionality come at a price! A DJ controller is a valuable piece of kit whether you're a beginner or a pro. You might find that you never need more than two channels for a home unit, even if you're out playing clubs. If you go for a four-channel controller from the outset, learn your skills and technical ability on two channels. Trying to run before you can walk will make you sound like you're running with cymbals on your knees.