Speaker protection for surround sound systems

摘要

An audio/video receiver configured to limit the power delivered to its speakers based on real time calculations. First, power delivered to the speakers is limited to the power rating of the speakers during short durations. Second, a secondary longer time constant Root-Mean-Square (RMS) detector limits sustained power to the speakers for a predetermined fraction of the peak power rating.

主权项

1. An audio-video system for providing audio content to one or more speakers from an audio-video receiver, the audio-video receiver comprising:
an amplifier; a digital-to-analog converter; and a Digital Signal Processor adapted to limit a peak power delivered to the one or more speakers according to predefined calibration parameters, the predefined calibration parameters comprising;
a maximum power of the one or more speakers;an impedance of the one or more speakers;an amplifier gain of the amplifier; anda maximum output voltage of the digital-to-analog converter.