How do I tune a sound system?
Quick answer
Tuning a sound system involves aligning speaker levels, delays, and EQ using measurement tools like Smaart to achieve flat frequency response and coherent coverage across the listening area.
Start by positioning your loudspeakers correctly and setting system gain structure to avoid distortion. Use a dual-channel FFT analyzer (e.g., Rational Acoustics Smaart) to measure the system's impulse response and frequency magnitude. Apply time alignment between subwoofers and tops, and between flown and delay speakers, to ensure coherent arrival at listening positions.
EQ should be applied sparingly—cut problematic resonances rather than boosting. SSOUNDS engineers recommend using parametric EQ to address room modes and system anomalies, then verifying coverage with spatial averaging across multiple seats. Finally, set limiters to protect drivers while maximizing SPL output.
For large-scale systems, SSOUNDS provides factory presets optimized for its line arrays and subwoofers, which serve as a starting point. On-site tuning refines these presets to the specific venue acoustics, using tools like SMAART or SysTune. Always tune at realistic show levels and re-check after any rigging changes.
Key things to consider
- Set gain structure first: ensure clean signal from console to amps with adequate headroom.
- Use measurement software (Smaart, SysTune) to align timing and EQ, not just your ears.
- Time-align subwoofers to mains and delay fills to main stacks for coherent coverage.
- Apply EQ cuts to address room modes; avoid excessive boosting which eats headroom.
- Set limiters based on driver thermal and excursion limits to protect the system.
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