An audio amplifier device includes a power supply having an output for providing a supply voltage, a voltage divider connected to the output of the power supply for providing a divided supply voltage, and an audio amplifier that further includes a supply voltage rejection circuit. In an implementation, the method may include determining one or more request keywords associated with a request received from a requesting terminal. The present invention employs low molecular weight cationic lipids comprising at least one short lipid chain to enhance the efficiency and tolerability of in vivo delivery of siRNA. Once the dashboard has been activated, the user can interact with any or all of the widgets, and can configure the dashboard by adding, deleting, moving, or configuring individual widgets as desired.