Patent ID: 8019088

Claim:
A system for enabling low-frequency bandwidth extension and loudspeaker driver protection comprising: a dynamic high-pass filter electrically connected to receive a speaker input signal and to generate a filtered signal, the dynamic high-pass filter having a filter control port for receiving a control signal, a dynamic high-pass filter frequency and Q controllable through the filter control port; a control side chain comprising in series, a low-pass filter, a first full wave rectifier, and a first non-linear transfer function, the control side chain electrically connected to receive the speaker signal and to provide the control signal to the filter control port; a power amplifier electrically connected to the dynamic high-pass filter to receive the filtered signal, the amplifier for amplifying the filtered signal to generate a speaker signal; and a loudspeaker electrically connected to the amplifier to receive the speaker signal, the loudspeaker for transducing the speaker signal to generate an acoustic signal.