Switched Mode Power Supply 250W nominal output power, 400W peak output power, for Audio Power Amplifiers. Can provide differential output voltage within +-26 to +-33V. Designed for best efficiency, from minimum to maximum load. Some of the features include: quasi-resonant operation for better EMI and efficiency universal input voltage, 100 to 250V AC, very low idle power consumption, of less than 1W, complete protection including overcurrent, overvoltage, overtemperature.