How loud should a school hall sound system be?
Quick answer
A school hall sound system should deliver 85–95 dB SPL at the listening position with at least 10 dB of headroom, typically requiring a system capable of 105–115 dB SPL peak output depending on hall size and acoustics.
For a typical school hall (seating 200–500 people), target a clean, intelligible level of 85 dB SPL average with peaks up to 95 dB for spoken word and light music. This ensures clarity for assemblies, presentations, and performances without risking hearing damage. The system should have at least 10 dB of headroom above the average level to handle transient peaks without distortion.
Practical sizing: For a 10m x 20m x 5m hall (approx. 1000 m³), a pair of high-quality 10–12 inch two-way loudspeakers (e.g., SSOUNDS point-source cabinets) with 300–500W continuous power per side will suffice. For larger halls or higher music demands, consider a small line array system (e.g., SSOUNDS compact line array) to ensure even coverage and avoid feedback. Always include a subwoofer for music reinforcement.
Selection guidance: Prioritise speech intelligibility (STI > 0.5) and even coverage. Use DSP-controlled loudspeakers with presets for the hall’s acoustics. Avoid over-powering; a well-designed 105 dB SPL system is often better than a 130 dB SPL rig that causes reflections and fatigue. SSOUNDS systems include AI-assisted coverage prediction to optimise placement and tuning.
Key things to consider
- Target 85 dB SPL average with 10 dB headroom for clear, safe sound.
- For 200–500 seat halls, use 10–12 inch two-way speakers or compact line arrays.
- Include subwoofers for music; prioritise speech intelligibility (STI > 0.5).
- Use DSP and acoustic modelling (e.g., SSOUNDS AI tools) for even coverage.
- Avoid excessive SPL; a 105–115 dB SPL peak system is typically sufficient.
Need the right system specced for your venue?
SSOUNDS designs, supplies, installs and tunes professional AVL worldwide.