Now I understand. In Europe, the standard power supply lines are 220VAC. One of these power supplies, draining 200A, consumes approximately 3000W. The entire circuit of the power supplies is protected with a 63A circuit breaker. With supercapacitors, it is difficult to drain the 800A of the power supplies and if that happens, it is sustained for a few seconds, just enough to verify that the amplifier delivers its maximum power.