How many speakers do I need and where should they be placed?

Speaker count and placement are driven by room geometry and audience coverage, not a simple formula. A narrow, deep ballroom might need a pair of main speakers plus rear delay speakers to reach the back rows evenly. A wide room might need wider speaker coverage or additional side fills. Rooms with balconies often need under-balcony fills to cover shaded areas.

The goal is even SPL (sound pressure level) throughout the audience, meaning the people in the back row hear at roughly the same clarity and volume as the people in the front. Delay speakers are positioned further back in the room and time-aligned to the main system so that sound arrives at the listener's ears without echo or smearing. A system engineer handles this design and tuning process.