Live entertainment · live
Cardioid subwoofer array
Also known as cardioid sub array, directional sub array.
A low-frequency array configured with spacing, delay, and polarity to reduce radiation in selected directions.
In practice
The technique can reduce stage or neighborhood spill, but performance changes with frequency and geometry and requires measurement, correct deployment, and suitable processing.
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Sources
Educational reference only. Requirements vary by jurisdiction, employer, venue, and production context.