Negative stiffness is generated for a vibration system of a speaker unit by using a movable magnet attached to {HEAD ~ the vibration system} of the speaker unit and {TAIL ~ also a ring} like stationary magnet arranged coaxially at the outer radius thereof in order to increase equivalently internal volume of a cabinet 
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Negative stiffness is generated for a vibration system of a speaker unit by using a movable magnet attached to { HEAD ~ the vibration system } of the speaker unit and { TAIL ~ also a ring } like stationary magnet arranged coaxially at the outer radius thereof in order to increase equivalently internal volume of a cabinet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH