In {HEAD ~ addition}, an offset in the displacement direction of the vibration system of {TAIL ~ the speaker unit} is detected with a Hall element and fed back to a power amplifier in order to correct the offset in the displacement direction of the vibration system of the speaker unit 
In { HEAD ~ addition } , an offset in the displacement direction of the vibration system of { TAIL ~ the speaker unit } is detected with a Hall element and fed back to a power amplifier in order to correct the offset in the displacement direction of the vibration system of the speaker unit
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH