An enhanced color messaging instrument gauge assembly is disclosed having a lens with one or more surface interruptions. The servers include a plurality of subsets, each subset being located at one of a plurality of Internet data centers. The test values of the timing parameter and the install time determined for the sample computing machines are analyzed to determine an install time calculation expression for the installation configuration option. The value of the property is assigned the default value when the state is the default state. Another embodiment includes a class AB output stage adapted to receive and amplify an input digital audio signal to generate an analog output signal, and circuitry adapted to enable the digital audio amplifier to be configured to enable the class AB output stage and to disable the class D output stage.