Final answer:
Side fills are speaker systems that cover more area of a stage than a single wedge, providing better sound distribution for performers and reducing the need for multiple wedges.
Step-by-step explanation:
Side fills cover more area of the stage than a single wedge. In the context of stage setups, side fills refer to speaker systems placed to the side of the stage to improve sound distribution, allowing actors and performers to hear themselves and the band without the need for a traditional monitor wedge at their feet.
This stage design is part of what allows for effective movement and positioning, known as 'blocking' in theatrical terms, which helps ensure that all members of the audience have a good auditory experience, as well as visual access to the performance no matter where they are seated.
Placing side fills strategically can reduce the number of wedges needed and provide a clearer stage area for performers to move and interact.