I thought I would post some graphs. Here is a 25 cf enclosure, 1,200w applied. You can see that with a 10" port, the first port resonance is awfully low.
Here's the port velocity:
Doing the image capture, I noticed that at 12Hz the port velocity is not that bad. How often do you suppose there is going to be 10Hz content? Is a peak velocity of 26 m/s going to cause audible chuffing with a 10" flared port?
25 cf is rather large...