How many speakers do I need for 800 people?
Quick answer
For 800 people, a typical professional system uses 6–8 line array enclosures per side (e.g., SSOUNDS compact line arrays) plus 4–6 subwoofers, depending on venue geometry and SPL requirements.
Coverage is the primary driver: you need enough speakers to evenly cover the audience area without dead spots. For 800 people in a standard indoor venue (e.g., 30m deep × 20m wide), a left-right line array with 6–8 boxes per side provides consistent 120° horizontal coverage and controlled vertical dispersion. SSOUNDS engineers use acoustic modelling software to optimize array curvature and splay angles for uniform SPL across all seats.
SPL targets: for speech reinforcement, 85–90 dB average with 10 dB headroom is sufficient; for music, aim for 95–100 dB average with 15–20 dB headroom. A typical SSOUNDS compact line array delivers 130–135 dB peak SPL per box, so 6–8 boxes per side easily achieve 100+ dB at the back row. Subwoofer count depends on bass energy: 4–6 single-18" subs (e.g., SSOUNDS subwoofers) in cardioid or end-fire arrays provide tight, punchy low end for 800 people.
Rule-of-thumb: start with 1 line array box per 50–100 people (depending on throw distance) and 1 sub per 150–200 people. For 800 people, that suggests 8–16 main boxes and 4–6 subs. However, venue shape, ceiling height, and noise floor affect final counts, always model the space. SSOUNDS offers free system design support to ensure accurate sizing.
Key things to consider
- 6–8 line array boxes per side (left/right) for even coverage
- 4–6 subwoofers for adequate low-frequency impact
- SPL target: 95–100 dB average for music, 85–90 dB for speech
- Use acoustic modelling (e.g., SSOUNDS software) for precise deployment
- Adjust based on venue shape, height, and background noise
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