Car Audio Display Board (like Best Buy)

So, you walk into the car audio department of Best Buy or any other car audio store, you press a button to select the radio, speaker pair, and maybe a sub-woofer..... and you hear sound from the options you selected.... I am looking to build the same system and Arduino seems to be a good choice. Does anybody know of a project similar to this? Any way to do this on 1board or would I need multiple boards for each group (such as stereos, amplifiers, speakers, etc...

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