| 20110170706 | Feedback-Killing Speaker System - A speaker system includes an interface, a powered mixer, a first amplifier, a switch, a feedback killer and a second amplifier. The interface can receives an audio signal from a sound source. The powered mixer adjusts the audio signal by amplifying some of the frequencies of the audio signal. The first amplifier preliminarily amplifies the adjusted audio signal. The switch connects the first amplifier to the feedback killer if the amplitudes of any frequencies of the preliminarily amplified audio signal are outside a predetermined range and otherwise connects the first amplifier to the second amplifier. If the first amplifier is connected to the second amplifier, the second amplifier amplifies the gain of the preliminarily amplified audio signal. If the first amplifier is connected to the feedback killer, the feedback killer executes feedback killing on the preliminarily amplified audio signal before sending it to the second amplifier. | 07-14-2011 |
