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Loudspeaker or loud-speaker or speaker is an electroacoustic transducer which converts an electrical audio signal into a corresponding sound Stock Vector Image & Art - Alamy
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CS4418A - 5 transducers 4-Way Full Range Cinema Speaker - CS Series Cinema Speaker - Beta Three Technology Creates Sound Enjoyment
Louder, Faithful, and Consistent. Using Digital Signal Processing to Improve Loudspeaker Performance | audioXpress
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