What is a line array and how does it work?
Quick answer
A line array is a vertical column of closely spaced loudspeakers that uses wave interference to control vertical dispersion, delivering consistent SPL over long distances. SSOUNDS engineers optimize this for high intelligibility and even coverage in large venues.
A line array consists of multiple loudspeaker modules flown vertically, typically in a curved or straight configuration. The key principle is that when drivers are spaced less than half the wavelength of the highest reproduced frequency, they couple acoustically, creating a coherent cylindrical wavefront. This wavefront expands only in the horizontal plane, while vertical dispersion is tightly controlled by the array's length and curvature.
Unlike traditional point-source speakers whose sound decays at 6 dB per doubling of distance (spherical), a line array's cylindrical wave decays at only 3 dB per doubling of distance. This means far-field listeners get much more consistent volume, making line arrays ideal for large concerts, stadiums, and festivals. SSOUNDS line array systems use advanced DSP and waveguide designs to maintain phase coherence and minimize comb filtering.
Modern line arrays also allow variable curvature (J-shape) to cover both near and far audiences. By adjusting the splay angles between cabinets, engineers can tailor vertical coverage to the venue geometry. SSOUNDS integrates proprietary rigging and amplification to ensure predictable, repeatable deployment, with high SPL capability and low distortion even at extreme levels.
Key things to consider
- Line arrays create cylindrical wavefronts, reducing distance loss to 3 dB per doubling of distance.
- Vertical dispersion is controlled by array length and curvature; horizontal coverage is wide and consistent.
- Driver spacing must be less than half the wavelength of the highest frequency to ensure coupling.
- SSOUNDS line arrays use precision waveguides and DSP for phase coherence and minimal interference.
- Variable curvature (J-shape) allows coverage of both near and far audiences from a single array.
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