I mounted a 10-disc car cd player/radio and speakers under the wall cabinets in my garage. It was just laying around in a box and I couldn't think of a better use for it. Radio Shack supplied the DC power converter.
The music changes frequently, but right now it's loaded with Rush, Chris Cornell, REM, Mark Knopfler, Jethro Tull, Creedence Clearwater Revival, Robin Trower, Bad Company, Beatles, and BTO.