D'Appolito configuration: tweeter between the two mid/woofer drivers.
Is that the manufacturer's description of them? Is the mid/woof one unit or two (each)?
--Bill
No Bill, it is my own description.
And furthermore, the three drivers are slightly off axis from the front baffle;
on the inside of it instead of being centered.
The mid/woofers are one single driver; total of three drivers (including the tweeter) per each loudspeaker.
I can describe exactly what Image, the Canadian manufacturer, is saying from their advertising brochure if you want to, but it is simply that; publicity.
They were designed by Ian Paisley, a Canadian speaker designer (for Image, Mirage, Energy, ...), with the help of the NRC facilities, in Ontario, Canada. And at the time that Dr. Floyd O'toole was also working in Canada and also using those facilities. He might even have contributed to the design of the anechoic chamber, not sure though.
* The tweeter (SHD) is described as a Super Hyperbolic Dome (a soft dome tweeter)
with a multi-coated shaped dome. Durable cotton fibres are butyl damped and the dome itself has a special termination that lower resonance better than any usual method of formation. The Circular Suspension Roll feature allows for maximum decoupling of the entire dome. That tweeter crosses over to the woofers at 2000Hz.
The Mid/Bass driver is a trilaminate filled polypropylene cone with a unique pebbling feature that makes for higher rigidity. And inert Damping Surround is stitched around the cone reducing break-up modes that cause musical coloration.
The crossover is computer-optimized for accurate phase response and imaging.
The measurements of the Frequency Response are quite smooth; 150Hz to 20kHz +/-2dB.
And with excellent off axis dispersion from the measurements.
See, mostly all hyperbole from the manufacturer and reviewer's measurements.
But I bought them mainly for the excellent percussions reproduction, and the good punchy low bass (I luv organs; the instruments).