Live entertainment · live
Subwoofer
Also known as sub, low-frequency loudspeaker.
A loudspeaker system designed to reproduce the lowest part of an event’s audible frequency range.
In practice
Quantity, placement, processing, polarity, delay, array design, structural support, audience exposure, and neighborhood limits shape useful low-frequency coverage.
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Sources
Educational reference only. Requirements vary by jurisdiction, employer, venue, and production context.