I LIKE THIS AMP OVER THE TRIPATH 4 CHANNEL BOARD, IT IS SMOOTH ,SMALL BOARD. AND ONLY NEEDS ONE POWER SUPPLY VOLTAGE.. THE SPECS SHOULD TELL THE REST. THE POWER SUPPLY I AM USING HAS NEVER KICKED ON THE COOLING FAN, THIS SHOULD GIVE YOU AN IDEA OF HOW EFFICENT THAT THE BOARD IS. LOW POWER CONSUMPTION UNDER HIGH WATTAGE. I ALSO LIKE THE LOW IMPEDANCE [2 OHM] SO I CAN CONNECT MY 6 OHM KLIPSCH SPEAKERS IN PARALELL GIVING ME 4 SPEAKERS OUTPUT AT 3 OHMS EACH CHANNEL!