The graphic equalizer is the device used to adjust the room's frequency response. Each room has a different response caused both by its dimensions and by the materials from which it is made. Through the equalization we can correct the possible response problems that the room has to achieve the highest possible sound quality. They also serve to eliminate those frequencies that produce feedback with the microphone.

  The equalization must be carried out by specialized technicians, since measurement instrumentation is needed to be able to perform it. Once adjusted, this equipment must be covered so that it is not accessible to the general public.

  Some models have an integrated limiter to avoid going beyond a certain maximum volume and thus protect the speakers and amplifiers from possible breakages.