What is a line array and how does it work?
Quick answer
A line array is a vertical column of closely spaced loudspeaker drivers that work together to create coherent, long-throw sound coverage with controlled vertical dispersion and reduced energy loss over distance.
Line arrays are the backbone of modern large-scale sound reinforcement. Unlike traditional point-source speakers that radiate sound spherically, a line array arranges multiple identical drivers in a vertical line. When the drivers are spaced less than half a wavelength apart at the operating frequency, they couple acoustically, behaving as a single, tall source. This creates a cylindrical wavefront that drops off at only 3 dB per doubling of distance (instead of 6 dB for a point source), giving far greater reach and even coverage.
The key to a line array's performance is its ability to control vertical dispersion through mechanical splay angles between cabinets. By adjusting the angle between adjacent enclosures, engineers can shape the vertical coverage pattern to match the audience area, directing sound precisely where needed and reducing reflections off ceilings or floors. Modern line arrays also incorporate advanced DSP and amplification to correct for phase and frequency response, ensuring seamless summation across the array. SSOUNDS line array systems are engineered with precision waveguides and proprietary DSP presets to deliver consistent, high-fidelity sound even in challenging acoustic environments.
For touring and large installations, line arrays offer scalability: you can add more cabinets to increase SPL and extend throw, or fly smaller arrays for intimate venues. Their predictable coverage and high directivity make them the preferred choice for concerts, festivals, houses of worship, and corporate events worldwide.
Key things to consider
- Line arrays create a cylindrical wavefront, losing only 3 dB per doubling of distance vs. 6 dB for point sources.
- Vertical dispersion is controlled by adjusting the splay angle between cabinets, allowing precise audience coverage.
- Drivers must be closely spaced (typically less than half a wavelength) to couple acoustically and act as a single source.
- Modern line arrays use DSP and dedicated amplification to optimize phase alignment and frequency response across the array.
- Scalable design: more cabinets increase SPL and throw; fewer cabinets suit smaller venues.
Need the right system specced for your venue?
SSOUNDS designs, supplies, installs and tunes professional AVL worldwide.