the torres tuning calculator isn't working properly. the port tuning frequency is telling me all sorts of odd numbers. its telling me a port 10.5 H x 2.5 W x 24 L = 44.58 Hz with a box that has 1.91 gross volume. If I increase the length by 10 inches then it only drops less than one hertz, if i increase it by 20 inches then it bumps up to 53 hz. How the heck is this possible? But when the length is set to 15 inches the tuning frequency is 49 Hz. Its like theres no correlation between length and tuning frequency with this calculator