I'm planning to build a home movie theater in the next few years.
I was hoping someone could point me in the right direction when it comes to powering my equipment -

i have about 15,000 watts of audio equipment alone and im trying to figure out how much amperage this room will actually need dedicated to it.
when i calculate the amperage of just my subwoofer according to the way one website says it should be calculated i come up with this:

Amperage = wattage ÷ voltage.
so being that my sub woofer peaks (it also says to calculate based on peak and not continuous power ratings) at 5000w and says it is 12v (is it actually?) that would mean 416 amps?!@!? no way!

another website tells me to put 230 as the voltage in this formula.

this would make the total amperage 21.7 amps for just the single subwoofer.



I'm very lost and ive spent some time researching this now and i was hoping someone could point me in the right direction?

I cannot edit this post for some reason but this is an update:

I have learned that the correct way to do the math for the subwoofer is by taking the continuous power in wattage (NOT the peak power) and dividing it by the voltage (120 not 12)
1500w ÷ 120v = 12.5a under max load

so now my dilemma is that im not sure if i should be counting my avr as the maximum rating per channel

AVR:
marantz SR7012(listed as 200w per channel)

is this 1800w under full load?
i know some avr's would have 200w on just the first few channels and then it diminishes from there but is there any way of knowing?

https://forums.d2jsp.org/forum.php?f=188

You'd get an answer here.

thank you