Abstract: In the field of audio amplifiers, the prior art for high output power levels is now to use class D technology. In this technology, audio signals are converted into a pulsed signal. An audio amplifier 1 is proposed, with a modulator section 4 for accepting an input signal and outputting two intermediate signals, wherein the modulator section 4 is designed to generate the intermediate signals by modulating the input signal, with an amplifier section 8 for accepting the two intermediate signals and outputting two amplified signals, wherein the amplifier section 8 is designed to generate the two amplified signals by amplifying the two intermediate signals, the amplifier section having two power stages 11;12, with an end section 21 for accepting the two amplified signals and for outputting an output signal for a loudspeaker device 2, wherein the audio amplifier 1 can be switched between parallel operation and bridge operation.

Abstract: In the field of audio amplifiers, the prior art for high output power levels is now to use class D technology. In this technology, audio signals are converted into a pulsed signal. An audio amplifier 1 is proposed, with a modulator section 4 for accepting an input signal and outputting two intermediate signals, wherein the modulator section 4 is designed to generate the intermediate signals by modulating the input signal, with an amplifier section 8 for accepting the two intermediate signals and outputting two amplified signals, wherein the amplifier section 8 is designed to generate the two amplified signals by amplifying the two intermediate signals, the amplifier section having two power stages 11;12, with an end section 21 for accepting the two amplified signals and for outputting an output signal for a loudspeaker device 2, wherein the audio amplifier 1 can be switched between parallel operation and bridge operation.

Abstract: The invention relates to a method for operating a class-D amplifier (2) for an audio signal (4), which class-D amplifier contains an output stage (10) and a signal-processing unit (12) in a signal path (6), wherein a voltage (U) of at least two magnitudes (U1, U2) is provided for the output stage (10), a voltage requirement (B) of the output stage (10) for the audio signal (4) is predictively determined from the audio signal (4) at a measurement location (14) before the signal-processing unit (12), a magnitude (U1, U2) that is minimally sufficient for the voltage requirement (B) is selected on the basis of the voltage requirement (B) and said magnitude is applied to the output stage (10) before the amplification.

Abstract: The invention relates to a method for operating a class-D amplifier (2) for an audio signal (4), which class-D amplifier contains an output stage (10) and a signal-processing unit (12) in a signal path (6), wherein a voltage (U) of at least two magnitudes (U1, U2) is provided for the output stage (10), a voltage requirement (B) of the output stage (10) for the audio signal (4) is predictively determined from the audio signal (4) at a measurement location (14) before the signal-processing unit (12), a magnitude (U1, U2) that is minimally sufficient for the voltage requirement (B) is selected on the basis of the voltage requirement (B) and said magnitude is applied to the output stage (10) before the amplification.