Abstract: In a first aspect, the invention provides an audio amplifier. A regulator reference signal corresponding to an input audio signal is generated by regulator reference generator. A power signal is generated corresponding to the regulator reference signal by a voltage regulator. A compensation block also uses the input signal, or a delayed version of the input signal to generate a modulation control signal. A modulator generates a modulated signal in response to the modulation control signal. An output stage combines the power signal and the modulation signal to provide an output audio signal corresponding to the input audio signal. The compensation block may be a forward compensation block configured to compensate for characteristics of the regulator reference generator or the voltage regulator or both, and possibly other components of the amplifier. In other embodiments, the compensation block may be part of a feedback compensation loop.