A bass reproduction speaker apparatus comprising a speaker unit having a vibration system, a cabinet to which the speaker unit is attached, a movable magnet that moves together with {HEAD ~ the vibration system} of {TAIL ~ the speaker unit}, and a stationary magnet 
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A bass reproduction speaker apparatus comprising a speaker unit having a vibration system , a cabinet to which the speaker unit is attached , a movable magnet that moves together with { HEAD ~ the vibration system } of { TAIL ~ the speaker unit } , and a stationary magnet
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