Abstract: An audio amplifier may comprise a signal limiting circuit and a power amplifier. The signal limiting circuit may be configured to limit an audio signal received at an input and to provide it as a limited audio signal at an output. The power amplifier may have a supply connection which may be coupled to a power supply unit in order to supply power to the power amplifier. The power amplifier may be configured to amplify a signal, which may be based on the limited audio signal, and to provide it as a level-limited audio signal at an output which may be coupled to a load, so that the load may be operated at limited power. The signal limiting circuit may be configured to produce an audio signal which may be limited depending on the load.

Abstract: A process for the configuration of a public address system with at least one speaker box (8) and one amplifier (1) including a DSP (2.2) in the audio signal path supplying the speaker box (8) with an audio signal uses data that are transmitted by the speaker box (8) transmitted to the amplifier (1). Using these data, signal processing adapted to sound technology and/or electrical characteristics or surrounding conditions of the speaker box is adapted in the DSP (2.2), possibly in other functional elements of the amplifier (1). The data concern desired signal processing in the amplifier and are structured in a data format not specific to the DSP. They are converted in the amplifier (1) into DSP-specific parameter data. For the data conversion, interpretation data contained in the amplifier (1), which data relate to information concerning the DSP (2.2), possibly to additional functional elements in the amplifier (1), are used.