Not sure why people are making comments about two subs being "too much for your small room".
I suppose if you turn the volume up on both, then the two would overpower the room, but two subs are only as loud as you want them to be.
It's like saying a Porsche Spider has too much horsepower to drive the speed limit.
Makes no sense.
The reason to have two subs is because two subs sound better than one and will give you smoother low frequency response regardless of the size of your room.