I have a Tripp-Lite PR-40 for my general use (13.8V regulated, 40A constant), it goes for about 299 new if my memory serves me correctly... that is a fairly decent deal...Originally posted by stones A 12volt power supply that will plug into a wall socket, or a power "converter" is what you want., but be warned, the ones that put out seriouse juice to run car stereo stuff are expensive. ask your local car audio shop what they use for their demo board.