What size PA system do I need for 500 people?
Quick answer
For 500 people, a medium-format PA system delivering 120–125 dB SPL with 90° horizontal coverage is typical; SSOUNDS engineers recommend 2–3 line array elements per side plus 2–4 subwoofers, verified by acoustic modelling.
Sizing a PA for 500 people depends on venue type (indoor vs. outdoor) and desired headroom. A practical rule of thumb: aim for 120–125 dB SPL at the listening area, with even coverage across the audience. For a standard indoor space, a pair of compact line arrays (2–3 elements per side) or two high-output point-source boxes per side will suffice, paired with 2–4 subwoofers for low-end impact.
Coverage is critical: a 90° horizontal dispersion pattern typically covers a 30–40 metre deep audience area. SSOUNDS engineers use proprietary acoustic modelling software to calculate exact SPL, frequency response, and coverage for each venue, ensuring no dead spots and minimal feedback. Outdoor events may require an additional 3–6 dB headroom and more subwoofers.
Subwoofer count depends on bass content: for music with heavy low end (EDM, hip-hop), 4 single-18" subs or 2 dual-18" subs per side are common. For speech or acoustic acts, 2 subs may be enough. Always factor in amplifier power and DSP presets—SSOUNDS systems include integrated amplification and processing for optimal performance.
Key things to consider
- Target SPL: 120–125 dB for 500-person audience.
- Typical system: 2–3 line array elements per side + 2–4 subwoofers.
- Coverage: 90° horizontal, up to 40m depth.
- Outdoor events need 3–6 dB extra headroom.
- SSOUNDS uses acoustic modelling for precise sizing.
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