TA3020 Based amplifier with on board High-efficiency resonant power supply for high efficiency and very low noise. There are two versions of this amplifier, one is capable to deliver 300W at 4 Ohms on each channel in single ended mode or 960W in BTL mode, and a powerful version capable of delivering 400W on each channel in Single-Ended mode and up to 1340W on 4 Ohms in BTL mode. The amplifier can be powered from an AC mains supply with the voltage of 230V AC 50Hz or 110V AC 60Hz. It has on-board heatsinks and variable speed cooling fan, for low noise operation. The size of the board is 205mm long, 100mm wide and 50mm tall. Only need a case with connectors and potentiometers to make a very rugged and compact amplifier, whose overall size would be about 4 Inch wide, 2 inch tall and 8 inch long and the total weight including housing around 1.5 Kg. The amplifier module weights only 850 grams without housing.