Need a 14V power supply, and with 1 1600W amp, you would need a pretty hefty one. 130A@14V minimum. You can do low power with a computer PSU.
If you knew what you were doing, I would recommend making a linear power supply, buuuut in general as a safety thing, leave it to the pros. Buy something that's already been made, but it will cost you a pretty penny. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif