Power P = V Voltage * I current.How does one power a 4000 W continuous amp in the US? A 20A line won't even get close to enough power.
Given P = 4000W, V=120V, the typical current is 15~20 Amp.
The kicker is a typical receptacle can sustain multiples of the current for seconds.
According to above, a receptacle can pass through 3 times the rated current for 12 seconds without tripping.
Most bass scenes are transient. The Olympus Has Fallen - Washington Monument scene has perhaps the longest continuous ULF bass signal. That is only ~18 seconds...