When I demoed the 28/3 model I found it to be very coherent. And, this was literally minutes after hearing a single-driver speaker in the same system. I listened for a disconnect between the cone bass and the horns above but nothing stood out.
Just read this blurb about the Odeon speakers and room at Munich:
"The new Carnegie speakers feature a 38in woofer cone in a bass reflex design and were being driven by electronics from Russian brand, NEM, and a Reed turntable. Sure, it sounded pretty good, but you will need 89,000 euros for the speakers..."