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Amazon.com: Parametric Speaker
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ELTEM/PROPA-U100 / Directional Loudspeaker, Directional Speaker, Ultrasonic Speaker, Directional Sound System for Museums, Exhibits, Art
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Amazon.com: JBL Professional PRX908 Next-Generation 8-Inch Powered Portable 2-Way Loudspeaker with DSP, 12-band parametric EQ, and Built-in Effects : Electronics
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Amazon.com: Parametric Speaker
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