Tony Gee did it, it's on Data-bass...should I do it?

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Once the box gets small enough, the tapped horn will have the same sensitivity and frequency response as a ported design of the same size. Always model your driver from a tapped horn design in a ported design of the same volume.

As tapped horns get larger they can trade low frequency extension for sensitivity and output while maintaining a relatively flat frequency response.

Whereas ported designs mostly improve their low frequency extension (a bandwidth increase), and drop in sensitivity.

I totally agree with you, but I will add that even in a small tapped horn that ends up with the sensitivity of a standard ported box, you can still get two, if not three excursion minimums within the passband of the tapped horn, that you can't get in a standard ported box no matter what.
 
A ported cab can not increase it's apparent output at high frequency as you only have a direct radiator. Only at the low corner does the port increase output.

Mouth excursion is the movement of air in and out of the mouth just as if it was a direct radiator doing the same work with the same area.

TH_exc.PNG

As can be seen a small movement of the cone results in a larger movement at the mouth. Mouth area is the same as Sd and you could imagine a driver in a sealed box with the same excursion as the mouth.
You can see this increase of air movement as gain.
Only way below tuning does the TH stop increase output making a sealed box a better alternative below 26Hz.

A minimum gain of two means that for every movement the cone does the mouth does at least the double.
 
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