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17
• Time Align
• Signal delays are used when multiple speakers are in use but speakers are at different distances from the audience.
• Examples:
• A subwoofer in front of the stage, while this full range speaker in on the stage. In this conguration, the Mix Out
XLR to subwoofer will need to be slightly delayed to make up for its closer position to the audience.
• The Mix Out XLR out is feeding an additional full range speaker placed half way back in the audience, to give
additional listening distance. In this case, delay the back ll speaker in the audience to compensate correct time
alignment.
• Time Alignment Basics:
• To compensate for different distances’, determine the speaker farthest from the audience and delay other
speakers with the same signal to “time align” with the speaker farthest away from the audience.
• Sound travels through air at average humidity and room temperature at about 1.1 feet per ms. Measure the
difference in distance of each speaker feeding the audience. Feed the speaker farthest from the audience with
no time alignment delay. Set delays for the other closer speakers based on their distance ahead of the farthest
back speaker. Measure the distance difference and enter 1 ms per 1.1 feet that each speaker is ahead of the
farthest back speaker in your conguration. Time alignment is not perfect as not all audience positions measure
the same speaker distance differences.
• “Delay Mix Out” places audio signal delay on the Mix Out feature of the PRX900 Series. You can place up to
20ms of signal delay adjustable in 100 microsecond intervals.
• “Delay This Speaker” adds up to 180ms of signal delay to the power output section of the speaker, adjustable in
100 microsecond intervals..
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