How many subwoofers do I need for 800 people?
Quick answer
For 800 people, a typical rule of thumb is 4 to 8 high-output subwoofers (e.g., dual 18-inch) depending on music genre and SPL targets, but SSOUNDS engineers always model the venue acoustically for precise deployment.
For an audience of 800, subwoofer requirements depend on the event type. For speech or acoustic music, 2–4 subs may suffice. For electronic dance music or rock, 6–8 high-output subs (e.g., dual 18-inch) are common to achieve chest-thumping low end. Coverage area (e.g., indoor vs. outdoor) and desired SPL (typically 105–115 dB at FOH) drive the count.
A practical starting point: one dual 18-inch subwoofer per 100–200 people for moderate bass, or per 100 people for heavy bass. However, room acoustics, subwoofer placement (cardioid arrays, end-fire, etc.), and coupling effects dramatically change requirements. SSOUNDS engineers use AI-assisted acoustic modeling to predict coverage and SPL, ensuring even bass distribution without dead spots or overloading.
Always factor in headroom: subs should run at 70–80% of their maximum output to avoid distortion and protect drivers. For 800 people, renting or purchasing 4–8 high-quality subs is a safe range, but a professional system design from SSOUNDS will optimize count and configuration for your specific venue.
Key things to consider
- Rule of thumb: 1 dual 18-inch sub per 100–200 people for moderate bass; 1 per 100 for heavy bass.
- Indoor venues require fewer subs than outdoor due to boundary loading; outdoor events may need 2x the count.
- Always model the venue: SSOUNDS uses AI-driven acoustic simulation for precise subwoofer deployment.
- Leave headroom: run subs at 70–80% max output to maintain clarity and reliability.
- Consider subwoofer array types (cardioid, end-fire) to control rear radiation and improve front coverage.
Need the right system specced for your venue?
SSOUNDS designs, supplies, installs and tunes professional AVL worldwide.