One would expect that a power supply for a 400W amp, would be capable of well over that to keep the peaks from distorting. A 10A transformer at 24V is only 240W. How make a dual +-12V supply from a 24V SMPS. Asked 5 years ago. Modified 2 years, 7 months ago. Viewed 14k times. 18. I'm trying to power a home-made load cell transmitter using a 24V single SMPS. I need to make +12, 0 and -12 Volts that are capable of 50mA. I wish to power multiple channels of opamps and bridges. .

how to make 24v power supply