El, yes Martin King has done alot of work on this kind of design. His computer aided work, and other testing has yielded some interesting stuff.
The truncated top is touted to reduce certain "problematic" effects because he seems to have determined that the "point" at the top is a problem.
Also, by making a small round port, instead of the traditional "mouth" at the bottom, he's made them more like a bass-reflex design than the original design was.
I haven't tried his design, but it seems to look good on paper.
It is somewhat surprising to hear that deeper bass coming out of a single-driver system. Kind of nice. Not really getting into the really deepest range, but not bad.
He definitely has found out about the baffle-step problem, and designed an electronic baffle-step compensation network that would work for those with extra amplifier power(who can stand to chop 5db off their efficiency rating).
Regarding the "hanging on the wall" type of quarter-wave pipe, you could do that if you are handy at making the "coiled" design out of wood. No reason why it shouldn't work out well that way.
I just made mine from the original idea, and it worked out for me, with a few mods needed. Maybe these others are even better, I don't know.
These speakers can be pretty darn good, if you pay attention to the details about their designs.
The truncated top is touted to reduce certain "problematic" effects because he seems to have determined that the "point" at the top is a problem.
Also, by making a small round port, instead of the traditional "mouth" at the bottom, he's made them more like a bass-reflex design than the original design was.
I haven't tried his design, but it seems to look good on paper.
It is somewhat surprising to hear that deeper bass coming out of a single-driver system. Kind of nice. Not really getting into the really deepest range, but not bad.
He definitely has found out about the baffle-step problem, and designed an electronic baffle-step compensation network that would work for those with extra amplifier power(who can stand to chop 5db off their efficiency rating).
Regarding the "hanging on the wall" type of quarter-wave pipe, you could do that if you are handy at making the "coiled" design out of wood. No reason why it shouldn't work out well that way.
I just made mine from the original idea, and it worked out for me, with a few mods needed. Maybe these others are even better, I don't know.
These speakers can be pretty darn good, if you pay attention to the details about their designs.