II. Audio Sensitivity ControlThe D460 allows the flexibility of controlling the left and right channel gains for the incoming audio signal. The sensitivity allows a control of -12 dBup to +6 dB, and is an excellent tool for maximizing the full output potential of your source equipment (Fig. 3).Fig. 3To best utilize this feature, set the volume for the source at its fullest output level. Then adjust the left and right sensitivity trims on the amplifier toallow the fullest possible output from the speakers without distortion.+6 or a counter-clockwise turn is used to reduce the gain. This would be the preferred setting for a distributed audio system with variable preampline outputs, such as any of the NuVo systems. Reducing the gain can also be useful for limiting the maximum power going to the speakers.O or straight vertically is the factory default. This is the preferred setting for an audio signal from a preamp, such as a distributed audio systemwith a fixed preamp line output, or the audio output of a music server or CD player.-12 or a clockwise turn is a high gain position. This is typically used when the incoming audio signal is weak, such as a portable CD player or cabletv box.III. Power ModeThe D460 provides three basic methods for supplying power to the amplifier. This can be accomplished by simply pushing the Power button on thefront of the unit, by sensing an incoming audio signal, or by supplying a 3-30 volt AC or DC current. The Power Mode switch on the back of theamplifier (Fig. 4) sets the amplifier to respond to any of these three options. Note that the Power Mode is set independently for Amplifier A and B.Fig. 4Left and RightSensitivity Trims11