Where does this come from, and can I check it?

Stacked subs fed with delay cancel low frequencies behind the stage. The figure is taken from L-Acoustics, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a music fact?

Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Cardioid subwoofer arrays push bass forward

Stacked subs fed with delay cancel low frequencies behind the stage Deep bass spreads in every direction, so a wall of subwoofers sends as much energy at the neighbours as at the crowd. Reversing one cabinet and delaying the others makes their rear output cancel while the front adds together. Festivals use the technique to satisfy noise limits without losing punch on the field. It sits in Mondo's music collection, one of 200 facts that each trace back to the reference below.

Where this comes from

L-Acoustics

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Science trivia Technology trivia

More facts like this

Feedback is a loop that feeds itselfA microphone picks up a speaker, which feeds the same tone back louder Vinyl cutters fold deep bass into monoOut-of-phase low frequencies would throw the stylus out of the groove The same stage microphone has been standard since 1966The Shure SM58 is a budget dynamic built to survive being dropped A live show needs two separate sound systemsThe audience hears the main system, while the band hears monitors pointed back at them Line arrays keep big crowds at even volumeCurving a stack of cabinets steers sound further without blasting the front rows The Shure SM58 became the standard stage microphoneThe cardioid dynamic mic arrived in 1966 and has barely changed since

Tags: live-sound, bass, acoustics

Cardioid subwoofer arrays push bass forward: the short answers

Where does this come from, and can I check it?: Stacked subs fed with delay cancel low frequencies behind the stage. The figure is taken from L-Acoustics, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a music fact?: Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.