| 摘要 |
A compensating feedback 21 is applied to that or one of the stages of the amplifier which precedes the power stage A and which is associated with the positive amplifying element 10, this compensating feedback being proportional to the output voltage applied to the loudspeaker 9 and being determined so as to increase the amplitude of the positive half-waves of the sinusoid of the signal applied to the loudspeaker 9 to a value which is substantially equal, all other things being equal, to that of the negative half-waves of this sinusoid. <IMAGE>
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