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