3-coil crossover traces.
The other picture is the final refinement on the port to an a on my first pair.
My second pair with a hardwired custom crossover will follow the same training method.
Yes... it looks odd work report wire sticking out, but I'm not gonna put on a new back panel. Boner thinking the port flyer was severely weakened the panel.
Each original court I installed was actually 3 1/4 inches ID. For some reason I didn't realize this at first, the tubing was Parts Express close out. I couldn't get the tuning spot on, because I wasn't taking into account the actual inner diameter of the tubes I had.
Actually, once I realize this, A 3 inch tube fits perfectly inside, and enabled me to easily play with the tuning.
The final specs are: Heavy damping, interior lined with one and a half inch foam. Directly behind the woofers is two pieces of 2 inch Pyramid foam by Auralex, slanted away from the ports.
I used bass box 6 pro's suggestion for the flattest response, of 35.68 Hz tuning. So each port came out to 6.177 inches. Each flare accounts for 2 1/2 inches.
Well, I have to correct this slightly, Bass Box actually recommended a slightly lower tuning by one hz ( ports would have been 6.95") or so, but I didn't like the sound as much. So this was my own fine-tuning. Which is pretty much the way the final design of more speakers is.. computers can't hear the sound like humans.
Once tuned properly, the sound is both astonishing and astounding. It runs deep, tight, clean, awesomely detailed.
It now blends damn near perfectly with the other drivers. And that was my struggle. Either too mushy/boomy, and/or super loud ( compared to the other drivers), or it was tight and clean but not at the proper level.
Finally nirvana.
I can play complex bass songs such as Cat Stevens Wide World, or Spoon Man for example, and it's tuneful clean, and at the proper level. And goes deep when need be, thanks to the port output, and doesn't struggle one bit, or lose its composure.
Now I can totally listen to the music and not listen to the speakers, exactly what I was looking for.
As a sidenote I removed the foam blocks on each side of the Heil.
It doesn't need them now, because they were a Band-Aid due to the miss match of the Daytons.
The inner 3 inch tube is secure, but I can easily remove the outer flares, because of the outside original tubing been 3 1/4 inches ID. So they are more or less press fit.
May look a little strange, but I'm not worried it sounds fantastic !!
Running the stock mid bass driver by the way.
I think I'm going to do that on my second pair as well.