PA system Q

[loverocket]

Adding more speakers and pointing them at the same area is not the answer in the quest for more volume unfortunately, but is a common mistake. The sound waves from each speaker interact, causing phasing problems, where they cancel each other out in some places, whilst combining in others. This is called comb filtering, and results in dips and peaks in sound levels at different frequencies as you move through the coverage area. The problem is worse the lower the frequency, as the wavelengths are longer, so the size of the area affected is larger. It results in muddy, uneven sound, and a lack of clarity. The answer instead is to get a more powerful amp and/ or speakers rated for higher levels. Probably not the answer you were hoping for though.

Here's a great lesson on subwoofer arrays. It explains all of the acoustic issues with adding multiple speakers:

http://www.excelsior-audio.com/Publi...fer_Arrays.pdf

[DubluW]

Here's a great lesson on subwoofer arrays. It explains all of the acoustic issues with adding multiple speakers:

http://www.excelsior-audio.com/Publi...fer_Arrays.pdf

Nice


Any decent diagrams for speaker placement etc?

[loverocket]

Every venue is different. Get there early, set up and experiment.