A loudspeaker RL and a DC blocking capacitor CDC are connected in series between the output node of {HEAD ~ the amplifier Ao} and {TAIL ~ ground} 
A loudspeaker RL and a DC blocking capacitor CDC are connected in series between the output node of { HEAD ~ the amplifier Ao } and { TAIL ~ ground }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL