Abstract: An electronic circuit for automatically adjusting the operating point of an audio amplifier comprising means for sensing the current flowing in the load, coupled to a first threshold detector, said first threshold detector having a plurality of outputs, each of said outputs representing some fraction of maximum load current; a plurality of timing means, each triggered by one of the plurality of outputs from said first threshold detector, each having a time constant inversely proportional to the fraction of load current represented; means for sensing the operating temperature of the amplifier output stage devices, coupled to a second threshold detector, said second threshold detector having an output which is enabled above a certain temperature and where said output may be used to inhibit one or more of the timer means; means for detecting bias level in a pre-driver stage, coupled to a low pass filter; a error amplifier, whose inputs are coupled to said temperature sense means, said timer outputs and said low