Pro Sound Speaker Placement

This video will cover Pro Audio Speaker Placement, and cover topics such as:
-comb filtering
-power alley
-corner loading
-boundary cancellation

Ratio doubling means:
− a sound pressure level of +6 dB SPL
− a power level of +3 dB
− an electric voltage level of +6 dB
− a loudness level of +10 dB
− 10 dB more SPL means 10 times increase in amplifier gain (amplification)

Unscientifically most people notice a difference of 3db, and 9db is perceived to be twice as loud.

Your main speakers should generally be about 10-15 feet apart. Assuming a 90° horizontal coverage, the speakers should be no further apart than twice the distance between the speakers and the first row of audience members. In other words, if the first row of the audience is 10 feet away from the speakers, the speakers should be no more than 20 feet apart. But assuming a smaller dance floor, if your audience is closer to you than 10 feet, which at most weddings they are, 10 feet apart would cover people dancing 5 feet in front of you. So rather than applying emotional reasoning like "headphone effect", start applying logical reasoning.
Coupling the subs will get you an extra 6db, 3db from coupling and 3db from having twice the power, theoretically, but closer to a 4.5 db gain. Couple them to two surfaces (floor and wall), less than about 1 ft away, will get you another 3 db. Couple them in a corner which is three surfaces, you will gain another 3 db. These are the tools that you need to understand and experiment with. Try different corners and different wall placements. Other reflective surfaces in the room will affect these placements. The trick is to place them and listen through trial and error. Keep in mind about canceling also, This happens when a speaker is more than a foot away from a wall and less than 8 feet. So you want to keep it against the wall, or move it more than 8 feet.


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