How many subwoofers do I need for 800 people?
Quick answer
For 800 people, you typically need 4 to 8 high-output subwoofers (e.g., dual 18-inch) depending on music genre and SPL targets; SSOUNDS engineers use acoustic modeling to determine exact requirements.
Sizing subwoofers for 800 people depends on venue layout, music style, and desired low-frequency impact. A common rule of thumb is 1–2 high-output subwoofers per 100–200 people for dance music, or fewer for speech. For 800 people, 4 to 8 dual 18-inch subs (like SSOUNDS subwoofers) are typical for rock or EDM events, providing chest-thumping bass across the audience area.
Coverage is critical: subwoofers should be arrayed (cardioid or end-fire) to control rear spill and even out bass response. SSOUNDS engineers use predictive software to model SPL distribution, ensuring consistent low-end coverage without dead spots. For outdoor events, you may need more subs to overcome open-air losses; indoors, room gain can reduce the count.
SPL targets matter: for a live concert aiming for 105–110 dB at the mix position, 4–6 quality subs suffice. For extreme bass (120+ dB), you might need 8 or more. Always factor in headroom—SSOUNDS recommends 3 dB of system headroom above target. A professional site visit and acoustic simulation are the best ways to finalize the count.
Key things to consider
- Rule of thumb: 1–2 high-output subwoofers per 100–200 people for music events.
- For 800 people, plan on 4 to 8 dual 18-inch subs; adjust for genre and SPL goals.
- Use cardioid or end-fire arrays to control bass directivity and reduce stage wash.
- Outdoor events require more subs (no room gain); indoor venues benefit from boundary loading.
- Always model with software (e.g., SSOUNDS acoustic prediction) for precise coverage and SPL.
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