How do I hook up a marine ship stereo and supply power usi

How do I hook up a marine ship stereo and supply power using an AC Source?
I want to put a ship stereo in my outdoor barbecue island. I know that I have to change AC power to DC power, with enough power to drive the speakers. I planned to use a laptop power supply cord since that could have more power than a common AC/DC converter. Will that work, and will I have to get some kind of adapter to get that wiring to hook up to the stereo?

A ten 15 Amp 13.8 volts supply will do the trick nicely.

Something like this
radioshack.com/product/index.jsp?productId=2103960&cp=2032056.2032145&parentPage=familyradioshack.com/product/index.jsp?productId=2103960&cp=2032056.2032145&parentPage=family">radioshack.com/product/index..

or here mainelectronics.com/samlex_linear.htmmainelectronics.com/samlex_linear.htm">mainelectronics.com/samlex_li.