I'm actually pretty pleased with my DE10+ME10 design, it'd probably be in my best interest to stick with it, but I saw the DNA-360 compared to the DE250 but for a bunch less, so I figured I'd give it a look. I put a lot of man-hours into the DE10's crossover to really flatten its response and get a impedance curve I could tolerate (I have a strong electrical background, but am weak on the acoustics side, so a lot of the circuitry was just trial-and-error; my textbook electrical filter knowledge showed how textbook it actually was). I've been pretty fickle, initially I was planning on a Eminence ASD1001, then a Selenium D200E, then the D220Ti, and then ended up at the DE10 after hearing so many people praise it's smoothness and clarity. Plus I can appreciate the extra engineering on the part of B&C in matching the ME10 to the DE10; the data for that combo is easy to find from numerous sources, so it was super convenient to work with in PCD. It took quite a bit of padding to get the DE10 down to the Auras, but it also had a very positive effect on the FR so no worries.
Here's the FR... I'm very happy with it:
This is as good as I was able to get the impedance. Most important was staying above 6 ohms, I have a lower model (Harman Kardon AVR-247, it's 55W/channel at 8 ohms is the main driving force in a high-sensitivity speaker) receiver that'll run a 6 ohm speaker but I didn't want to go any lower.
The crossover schematic. I obviously wanted to have a SINGLE crossover for all 4 woofers, but I couldn't figure out a good way in PCD to do that, other than calling 2 woofers and 2 midranges and designing identical circuits. I was going to convert the values to make a single crossover, but I'm not so sure anymore because I don't have really any way to judge if it'll negatively effect performance. Like I said, I don't have rhyme or reason for some of the things I did, I just messed around and figured out what changes resulted in what outcomes, and this was a combo that worked well.
The baffle, drawn to scale. The woofer horizontal C-C spacing and woofer to CD C-C spacing is less than a 2000Hz wavelength, and really everything else is as good as I could get it. I modeled it after several theater speakers, most notably the QSC SR-46 cinema surround. I'm going to make the baffle out of fiberglass so I can rear-mount the woofers and have the surround baffle edge contour down to the surround. The Auras have an ugly paper gasket stuck to the front, but other than that it's not bad looking, just a plain old paper cone.