How loud should a sound system be for 300 people?
Quick answer
For 300 people, a sound system should deliver 95–100 dB continuous SPL at the listening position with at least 10 dB headroom, typically requiring 2–4 full-range loudspeakers and 2–4 subwoofers depending on venue acoustics.
Coverage is as critical as raw SPL. For 300 people, you need even coverage across the audience area — typically a 120° horizontal dispersion per box. Two flown line array elements or two high-output point-source speakers per side can cover a 30m deep by 20m wide space. SSOUNDS engineers use acoustic modelling to optimise aiming and avoid hot spots.
SPL target: aim for 95–100 dB continuous at the furthest listener, with at least 10 dB of headroom for peaks. This means the system should be capable of 110–115 dB peak output at 1m. For a typical 300-person room (e.g., 15m deep), a pair of SSOUNDS 12-inch two-way loudspeakers with 600W each will comfortably hit that target.
Subwoofer count: for music with bass content, use 2–4 subwoofers (18-inch) in cardioid or end‑fire arrays to reduce stage rumble. For speech-only, one sub per side is sufficient. SSOUNDS recommends modelling the room to determine exact sub placement and number.
Key things to consider
- Coverage: 2–4 full-range speakers (e.g., 12″ two-way) with 90–120° dispersion.
- SPL target: 95–100 dB continuous at listener, 110–115 dB peak system capability.
- Subs: 2–4 × 18″ for music; 1–2 for speech; use cardioid for rear rejection.
- Headroom: at least 10 dB above continuous level to avoid distortion.
- Always model acoustically — SSOUNDS engineers use EASE or similar for precision.
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