How many watts of PA do I need for 5,000 people?
Quick answer
For 5,000 people, you typically need a PA system capable of 110–120 dB continuous SPL at the listening area, requiring around 20,000–40,000 watts of total amplifier power, but coverage and box count matter more than raw wattage.
Wattage alone is a poor indicator for live sound. For 5,000 people, the real requirements are coverage (even SPL across the audience), headroom (6–10 dB above average level), and low-frequency extension. A typical rule of thumb is 2–4 watts per person for moderate rock/pop levels, but this varies hugely with venue acoustics, speaker efficiency, and desired peak SPL.
SSOUNDS engineers approach this with acoustic modelling: for an outdoor festival of 5,000, a system like 8–12 line array boxes per side (e.g., SSOUNDS large-format arrays) plus 8–16 subwoofers (cardioid or end-fire) would deliver 115–120 dB at FOH. Amplifier power might be 20,000–40,000 watts total, but the key is matching amp power to driver thermal limits and DSP protection.
For indoor venues, reflections reduce required power by 3–6 dB. Always spec for the worst-case seat and include 3 dB of headroom. SSOUNDS provides full system design with EASE or proprietary prediction tools to ensure coverage and SPL targets are met without over-amping.
Key things to consider
- Target 110–120 dB continuous SPL at the listening area for 5,000 people.
- Use 2–4 watts per person as a rough guide, but efficiency and coverage are critical.
- Expect 8–12 line array boxes per side and 8–16 subs for outdoor events.
- Total amplifier power typically 20,000–40,000 watts, but DSP and driver limits matter more.
- Always model the venue acoustically; SSOUNDS offers free system design with prediction.
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