That's easy, go with the GT5.Decisions decisions...
That's about right. Right click on anywhere on the graph, select options. At the bottom is the "Air velocity". Click on "ft/s" until it changes to "m/s". Click on "OK".I am getting rear port air velocity of 79.995 ft/s peak at 16.24hz
Not possible with 300 watts input. The Re is 3.84 ohms for a 4 ohm load. It would take a little over 500 watts to reach Xmax at 30 hz.It's dual voice coil wired in series for 4ohm.
With a 9 Cuft ported to 20hz I seem to have too much cone excursion, 11.9mm at 31hz.