Eliminate phase problems!
8:36
Is doubling speakers +3dB or +6dB? What's parallel and series wiring?
30:10
Subwoofers (and the air itself!) are NOT in-phase with your mixer and amplifier.
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Things you didn't realize about bass... until now.
8:53
Smaart - sub woofer alignment with Keith Morris
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How To Eliminate Microphone Feedback | 5 Must-Know Tips
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Speaker Placement Basics For Small Concerts, DJ's, and Portable Churches
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How To Solve Phase Problems In A Mix
59:25