sir jojo yun po bang cbe-18 eh considered as "tapped horn-sub"? salamat po.
The Cyclope is a peculiar TH design with a complimentary symmetrical parallel horn...
A Tapped horn is one where both sides of the driver are coupled to the horn.
Usually, this kind of horn has a driver you can see near the mouth.
The throat end of the horn connects to the other side of the driver, the side you can’t see.
After the near end driver face, there is some length of horn before the exit.
If you thought of the horn as a letter P, the bottom is the horn mouth; the driver is mounted at the “tap” with one side facing the long way around and the other, the short way.
The idea came about when I observed the reflection in a high frequency horn where the driver was not at the “end”. I wondered what if I substituted an active source (the back side of the driver), now it would be constructive addition.
The advantage is that when you make a bass horn “too small”, it s response, particularly at the bottom, is a series of peaks and dips.
These reflect the changing load the “too small” horn places on the driver instead of a nice resistive load like a BIG horn.
With both sides of the driver driving the horn, but separated by a fixed phase (the path length between the two sides), one finds the two outputs add or not depending on the phase difference between them.
At the low cutoff, only one side of the driver (the longest path) feels a significant acoustic load, this is where the lowest big peak normally is, the region above that where the big wide dip would be, both sides of the driver add together fully, filling in the dip.
In effect, the radiator area of the driver changes with frequency allowing it (in a perfect world) to adapt to the change in resistance.
The above was written by the inventor...Mr. Tom Danley...TH is now fully Patented...not anymore a pending case...there is a legal issue...I guess.