How many speakers do I need for a festival?
Quick answer
For a festival, the number of speakers depends on venue size, audience capacity, and desired SPL; a medium festival (5,000–10,000 people) typically requires 12–24 line array cabinets per side plus 8–16 subwoofers, but a professional system design should be done by an engineer.
Determining the number of speakers for a festival involves calculating coverage, SPL requirements, and headroom. For a main stage with 5,000–10,000 attendees, a typical professional setup uses 12–24 full-range line array cabinets per side (left/right) and 8–16 subwoofers, often flown or ground-stacked. Smaller festivals (1,000–3,000 people) may need 6–12 cabinets per side with 4–8 subs, while large events (20,000+) can require 24+ cabinets per side and multiple sub arrays.
SSOUNDS line array systems are designed for scalable deployment: each cabinet delivers high SPL with consistent coverage, and our DSP presets optimize performance for flown or ground-stacked configurations. We recommend consulting with an SSOUNDS engineer for a precise prediction using acoustic modeling software, which factors in venue geometry, audience area, and desired sound pressure levels (typically 100–105 dB average with 10 dB headroom).
Beyond main PA, you'll need front fills, delay towers for long venues, and stage monitors. A rule of thumb: allocate 1–2 subwoofers per 3–4 full-range cabinets for balanced low-end. Always include redundancy (e.g., an extra amplifier channel) and consider environmental factors like wind or temperature gradients that affect coverage.
Key things to consider
- For 5,000–10,000 attendees: 12–24 line array cabinets per side + 8–16 subwoofers.
- Use acoustic modeling software (e.g., SSOUNDS prediction tools) for precise coverage and SPL calculations.
- Include front fills, delay fills for long venues, and stage monitors; plan for 10 dB headroom above target SPL.
- Subwoofer count: roughly 1 sub per 3–4 full-range cabinets for balanced bass.
- Always consult a professional system engineer to avoid under- or over-specification.
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