OP, short answer is YES it is possible as noted above. Also, if you do not want the above solutions, you can purchased a MARINE grade radio (12 volt) with the service you want built in, and have this installed. If you have an overhead tray, this is very easy, and then you already have a suitable location for the speakers.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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