A capacitor Cx is connected between the terminal Vx of the resistor Rx that is connected {HEAD ~ the non inverting input} of {TAIL ~ operational amplifier Ao} on the one hand, and on the other hand to the connection point VDC of the loudspeaker RL and the DC blocking capacitor CDC 
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A capacitor Cx is connected between the terminal Vx of the resistor Rx that is connected { HEAD ~ the non inverting input } of { TAIL ~ operational amplifier Ao } on the one hand , and on the other hand to the connection point VDC of the loudspeaker RL and the DC blocking capacitor CDC
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