When the bass reproduction speaker apparatus does not operate, e.g., when {HEAD ~ the power source} of {TAIL ~ the bass reproduction speaker apparatus} is turned off, the geared motor 227 a rotates the rotation shaft 227 b by about tens of degrees 
When the bass reproduction speaker apparatus does not operate , e.g. , when { HEAD ~ the power source } of { TAIL ~ the bass reproduction speaker apparatus } is turned off , the geared motor 227 a rotates the rotation shaft 227 b by about tens of degrees
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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