When planning an event, the size, type, and budget will determine what sound equipment is needed. Speakers should be chosen based on the venue size, shape, and acoustics, as well as the sound sources and content. Placement, orientation, and alignment are also important to avoid feedback, distortion, or dead zones. Microphones should be appropriate for the sound sources and purposes, such as handheld, lapel, headset, or podium microphones. The type, frequency, and directionality of the microphones should also be considered to avoid interference, noise, or feedback. Mixers control the volume, balance, equalization, and effects of sound inputs and outputs. It is necessary to choose mixers with enough channels, inputs, outputs, and features for the event. The location of mixers should be accessible and visible for easy and safe operation. Cables, stands, and accessories should be compatible, durable, and reliable for the event. The length of cables should be taken into account to prevent clutter or confusion. Labeling cables can also help to avoid hazards.