In all reality, the unit can be plugged into a circuit that has a 20 amp breaker, and in that case the typical 20 amp CB will permit a bit over 20 amps into a resistive load. So in real life a not so uncommon setup can feed 20(+)x120 watts into a device like our amp. I bet 2500 watts input wouldn't be out of the question at all, particularly for periods measured in minutes.