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