Archive for October, 2009
Audio System
Class AB Audio Amplifier
When selecting the audio components, we wanted to go with something that was fairly powerful and clean sounding, to make our device comparable to other sound docks on the market. We elected to use a Class AB Panasonic AN17822A audio amplifier and two CUI CMS0401KL 40mm 4W speakers. The audio amplifier had an adjustable volume input, and the speakers provided excellent frequency response. Our first testing involved connecting the iPod’s line out pins directly to the amplifier, and the results were fantastic.
The next step was selecting an audio multiplexer. We chose one with a low Ron value to have minimal effect on the audio stream being passed through. This mux will enable us to connect both the iPod and FM Radio to the single pair of amp inputs, and alternate between them.