Originally Posted by Sovkiller
This is a gross generalization...
Yes, it is indeed intended as an gross generalization, and you are right about the various design on speaker technology. However, given most of the speakers you will find in a household electronics are using bass reflex design, I don't think it is that far off to suggest the same is used in SA6 Bass+ port. Of course, I am not suggesting it is the only design in speaker design, nor it is the most superior design. In fact, if you look at the wiki link in my post, the listed limitation is almost 5x longer than its advantage. The wiki link also includes another link to various loudspeaker enclosure designs if the OP is interested in learning more.
Did that. The bass is very slightly increased and a bit more airy, but not worth the potential trouble of dirt and dust getting inside.