Subwoofer Interactions – Avoiding the “Power Alley”

Latest installment of the PSW Subwoofer Series reveals the puzzling interactions of subwoofers and offers solutions for delivering optimized, consistent low-end performance

By PSW Staff August 17, 2017

Subwoofer cancellation is not an unusual occurrence, especially for open-air applications. There can be low-frequency cancellations in some audience areas while others are too hot, creating a narrow center line of left and right with interference-free bass, known as the “power alley.”

In Part 3, Chapter 4,”The ‘Power Alley’, A.K.A., Troubling Interactions of Subwoofers“, Jose Brusi, a noted independent electroacoustical consultant, explains:

● Comb Filtering Effects
● Time Arrival Differences
● Directivity & Frequency
● Lobes & Nulls
● Placement Issues/Factors
● And More!

Take a moment to download this free resource to get a better understanding of subwoofer interactions and the solutions available for delivering optimized, consistent low-end performance.

Presented by Fulcrum Acoustic, the five-part Subwoofer Series features top authors from ProSoundWeb and Live Sound International providing their insights on the evolution, designs, configurations and more of sub-bass systems for live sound reinforcement.

The series will consist of six (6) chapters in total, all available as free downloads. Over the coming weeks, subsequent chapters will address key subjects such as aux-fed sub technique, sub arrays, and more.

And if you missed any of the previous chapters, no worries — they’re also still available. Go to here for Chapters 1 and 2 (“It’s All About The Bass, And Moving Air,”) and here for Chapter 3 (“The Best Place To Put Subwoofers Is…?).


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