An audio/video device having a volume control function for {HEAD ~ external audio reproduction units} by using {TAIL ~ volume control buttons} of a remote controller is provided 
An audio / video device having a volume control function for { HEAD ~ external audio reproduction units } by using { TAIL ~ volume control buttons } of a remote controller is provided
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH