What size PA system do I need for 50 people?
Quick answer
For 50 people, a compact PA system with 1–2 small line-array elements or a single 12-inch point-source speaker per side plus a 15- or 18-inch subwoofer is typically sufficient, delivering 105–110 dB SPL continuous with even coverage.
For an audience of 50, you don’t need a large touring rig. A single high-quality 12-inch point-source loudspeaker per side (or a compact 2-way passive speaker) can cover a small room or outdoor area, provided it’s positioned properly. SSOUNDS engineers recommend targeting 105–110 dB SPL continuous at the listening position, with at least 6 dB of headroom for peaks. This ensures clear, intelligible sound without distortion.
Adding a single 15- or 18-inch subwoofer (or a pair for more even low-end) will give you punchy bass for music. For speech-only events, you may skip the sub. Coverage is key: place speakers on stands at ear height, angled to cover the full audience area. SSOUNDS uses AI-assisted acoustic modelling to predict coverage and SPL distribution, ensuring every seat gets consistent sound — a step beyond simple rule-of-thumb.
If the space is long and narrow, consider a single central cluster or a pair of speakers with narrow horizontal dispersion. For wider rooms, use speakers with wider coverage (e.g., 90° x 60°). SSOUNDS compact line-array systems can also be deployed in small arrays of 2–4 elements for superior vertical pattern control, but for 50 people a point-source solution is often more cost-effective and simpler to set up.
Key things to consider
- Use 1–2 compact point-source speakers (12-inch or dual 8-inch) per side for 50-person audiences.
- Target 105–110 dB SPL continuous with 6 dB headroom; add a single 15- or 18-inch sub for music.
- Position speakers on stands at ear height, angled to cover the full audience area evenly.
- For speech-only events, a subwoofer is optional; prioritise clarity and coverage.
- SSOUNDS engineers use AI acoustic modelling to optimise coverage and SPL for any venue.
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