I just purchased a VTF-3 MKII. It is an open concept house, not too many walls. The sub is in a room with very high ceilings. The best place I can come up is by the couch. The port is facing back to the wall, about 1/2 feet to a feet. However, behind the sub, around the same height of the port, we have a window. So part of the port is supported by the wall, another part by the window. In your opinion, will this cause a problem, the situation with the window?