How loud should a sound system be for 20,000 people?
Quick answer
For 20,000 people, a sound system should deliver 100–105 dB SPL average at the listening area with peaks up to 120–125 dB, requiring a large line array system with 24–36 enclosures per side and 24–48 subwoofers, depending on venue geometry and genre.
Sizing a PA for 20,000 people depends on coverage area and desired SPL. A rule of thumb: aim for 100–105 dB average with 15–20 dB headroom for peaks. For a typical outdoor festival with a 100m deep audience, you need a system capable of 130–135 dB at 1m from the array. SSOUNDS engineers use AI-assisted acoustic modeling to predict coverage and SPL distribution, ensuring even levels across the entire audience.
A common configuration is 24–36 line array enclosures per side (e.g., SSOUNDS large-format arrays) flown at sufficient height to cover the full depth. Subwoofer count ranges from 24 to 48 units, often cardioid-arranged to reduce rear spill. For wider or deeper venues, delays or additional hangs may be needed. SSOUNDS systems are designed with advanced DSP presets that optimize performance for each venue, reducing setup time and ensuring consistent results.
Key factors: venue shape, background noise, music genre (EDM needs more low-end), and local noise limits. Always model with software like EASE or SSOUNDS’ own prediction tools. A well-designed system for 20,000 people will be clear, powerful, and safe for both audience and equipment.
Key things to consider
- Target average SPL: 100–105 dB at listening area, with 15–20 dB headroom for peaks.
- Typical line array count: 24–36 enclosures per side; subwoofers: 24–48 units.
- Use acoustic modeling software (e.g., SSOUNDS AI-assisted tools) for precise coverage and SPL prediction.
- Consider venue geometry, background noise, and genre when specifying system size.
- Always include delays or fills for very deep or wide audience areas.
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