So, I played with one of my speakers for a little while this afternoon, took some pictures and a video.
Youtube video. (5hz at a low level, then a near 300w "burp" at 17hz). The amp I used is only rated for 300w.
http://www.youtube.com/watch?v=u9AOuOaxNlQ
The designer of this speaker put a pole vent screen on it, which greatly increases the mechanical noise via "port noise" so to speak. Air should move effortlessly and this screen pretty much kills that idea. Sure it provides a measure of safety for the speaker (not sucking up loose poly or fiberglass), but at the cost of increased noise.
The noise will be a non-issue in a sealed box in a car, but in a ported enclosure in a house, it won't due. A person will either need to use a passive radiator or go sealed. Being that my game plan is to use these outside, it will be a non-issue and I will be porting them.
Here's the pole vent screen.
And now pictures.
Tinsel lead running UNDER the spider.