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