How loud should a house of worship sound system be?

The ideal loudness for a house of worship balances audibility with reverence. For spoken word, aim for 75–80 dB SPL average at the listener position, with peaks up to 95 dB for emphasis. For contemporary worship music, 85–95 dB average with 100–105 dB peaks is common, but always consider room acoustics and congregation comfort.

To size a system, calculate the required SPL at the farthest seat. Use the inverse-square law: for every doubling of distance, SPL drops by 6 dB. A typical 200-seat room might need a system capable of 120 dB SPL at 1 meter to achieve 95 dB at the back. SSOUNDS line arrays or point-source systems with 90° x 60° coverage can efficiently cover rectangular sanctuaries.

Selection criteria: prioritize speech intelligibility (STI > 0.5) and even coverage. For smaller venues (under 500 seats), a pair of SSOUNDS point-source loudspeakers with a subwoofer may suffice. For larger spaces, a flown line array (e.g., SSOUNDS compact line array) provides consistent SPL and pattern control. Always include a DSP for limiting and EQ to prevent feedback and protect hearing.

Avoid over-powering: a system that can hit 110 dB continuous is often overkill. Instead, choose components that match the room’s reverberation time (RT60). For live rooms (RT60 > 1.5s), use narrow-dispersion speakers to reduce reflections. For dead rooms, wider coverage works. SSOUNDS engineers recommend on-site measurement to set optimal levels.