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Friendly using: shortcut for selecting presets Full protections:Overheat,Overload,DC,0vervoltage. Applications: ★ 2-ways,3-ways bi-amp mode active loudspeaker ★ Active Sub-woofer ★Active Sub-woofer powered for tops in 2 ways/3ways outputs ★2-ways,3-ways,4-ways requested active line array 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choice line array system for outdoor event musical show</video:title><video:description>AUDIOPEAK LA212 Line array system guard Guangxi China 2023 Musical Festival. 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