How many subwoofers do I need for a church?
Quick answer
For a typical church, 2 to 4 professional subwoofers (e.g., SSOUNDS dual-18" models) are sufficient for clear, even bass coverage, but the exact number depends on room size, layout, and desired SPL.
Determining the right number of subwoofers for a church involves evaluating the room's volume, seating layout, and the type of music or spoken word content. A common starting point is one dual-18" subwoofer per 200–300 seats, or roughly 1 sub per 1,000–1,500 sq ft of floor area. For example, a 500-seat sanctuary might need 2–4 high-output subwoofers placed strategically to avoid dead spots.
SSOUNDS engineers recommend using acoustic modeling software to predict low-frequency coverage. Factors like ceiling height, reflective surfaces, and whether the subwoofers are flown or ground-stacked affect performance. For even distribution, consider a cardioid subwoofer array (e.g., using SSOUNDS subwoofers with DSP presets) to reduce rear energy and focus bass toward the congregation.
For smaller churches (under 200 seats), a single high-quality 18" subwoofer may suffice. Larger venues (over 800 seats) may require 4–6 or more subwoofers, often arranged in clusters or distributed along the stage front. Always consult with a professional system designer to match subwoofer quantity to your specific room acoustics and SPL targets.
Key things to consider
- Start with 1 dual-18" sub per 200–300 seats or per 1,000–1,500 sq ft.
- Use modeling software (e.g., SSOUNDS prediction tools) to optimize placement and avoid cancellation.
- Cardioid arrays reduce rear bleed and improve front-of-house clarity.
- For spoken word, fewer subs may be needed; for contemporary worship, plan for higher output.
- Always allow headroom: choose subs rated for 3–6 dB above your target SPL.
Need the right system specced for your venue?
SSOUNDS designs, supplies, installs and tunes professional AVL worldwide.