If you invert subs, are they just as good as normal ones? I got my Type R fifteen in yesterday and realized that I didn't take mounting depth into account when I designed my box. I haven't built the box yet, but I don't want to have to change the design. The way the box is designed is that the subs go in on top, port out the bottom of the backside. 8.0ft^3 @roughly32-34hz. Maybe I could change the location of the port to the sides of the rear? Help please.