amplifier wiring to subwoofer help? easy 10 points?

AaA5

New member
My subwoofer is 400 watt rms at 2 or 8 ohm
my amplifier is 400 watt rms at four ohms and 2 x 200 watt rms at 2ohms
If i wire both 200 watt rms channels to my subwoofer will i get 400 watt rms at 2 ohms?
if not can you explain why please?
 
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