Wow.. what a terrible driver layout! You never place the higher-frequency drivers near the floor (or ceiling), as this creates a strong early reflection. This is why on most speakers, the HF driver(s) is(are) located far from the floor. Also, there has to be some substantial HF drop off at the listener, with the tweeter so far off axis from the listener, vertically.
-Chris
I have heard former versions of the Dynaudio Consequence loudspeakers. They have a long history, and go back to the era when the vogue was to chase transient perfect loudspeaker, which meant using a full range driver, first order filters, or the Quad ESL 64. That is still your options, and the late Jim Thiel was consumed with first order filters his whole professional life.
I was caught up with this also, especially after seeing Peter Walker cancel a square wave in free space reversing the connections to one of a pair of Quad ESL 64s. I still regard that as a remarkable feat by the way.
Now back 30 to 25 years or so ago, speaker manufacturers were much more forthcoming about their research drivers and speakers. The founders of Dynaudio, were a very open and decent lot, who would honestly answer anything you asked them. They also made their drivers freely available unlike now.
So smitten with this bug, I went to work on a largely first order filter system for a loudspeaker. The Dynaudio drivers at that time were specifically designed to make first order filters a realistic possibility. I embarked on this about the end of 1982. I had a system up and running by 1984, but it took me a full decade to get it right. It was an absolute nightmare. Like Dynaudio, I ended up using one series rather than parallel filter. These are horrid to work with because both sides of the filter are interdependent. They also present an absolutely grueling load to the amplifier.
I already had a TL with two KEF B139s topped out with four JW modules as a line source biamped at 400 Hz, topped out with a KEF T27 above 6 kHz, built in 1976.
So I decided to revise these speakers. I kept the low end and changed the crossover to 180 Hz third order active between the KEFs and Dynaudio M75 in its own overdamped TL to absorb the rear radiation without coloration, which is a driver in the conquest, but now souped up, mainly with gold trim I suspect. The KEF B139 needs a relatively high order crossover because it resonates violently between 1 and 1.2 kHz. Then I had first order crossover to Dynaudio D54 with a series first order crossover and a parallel first order crossover to a Dynaudio D21. Sounds simple but it proved anything but. I got so frustrated I built another pair of speakers to have something decent to listen to while I labored away on these. I was sorely tempted to ditch the project on many occasions.
Now the reason that the Consequence has to have the tweeter on the bottom is because of the lobing pattern of odd order crossovers. There is 15 degrees of tilt. So you have to put the tweeter high or low, not on the listening axis.
The Consequence uses for the bottom four, updated versions of the D21 AF, D28 AF, D76 and M75, I'm not sure what the woofers are.
The Consequence is actually a very good speaker. Bass is firm and tight and the rest of the range is smooth and articulate. You do however feel as if you are looking down on things. The speaker is sufficiently self effacing to imagine you are up in a balcony. It is quite an unusual design.
For my speakers, I put the drivers the other direction. They ended up really nice speakers. I brought them to Benedict with new lines for the KEFs and used them as the rear speaker, were they continue to shine on SACDs of antiphonal material.
I hate to make a spacer to bring the M75s forward of the other drivers a bit.
The tilt is fortunate, as the speakers are above the chairs, and the listening area is actually on axis.
While they were in Grand Forks ND, they managed to impress the hell out of Bob Carver when he paid a visit.
Really though Dynaudio would be further ahead developing a decent wide band mid and cutting out a couple of drivers.