Yeah, they try and get the large woofer to go higher than it should by putting it in an isobaric enclosure. Which does improve speed but does not turn it into a midrange. So the midrange comes off sounding pretty good and smooth because it is all the same driver, but a bit recessed or down in level, because the driver is too big and massive for the job.
That is what they did with Khorus, only with the additional super-tweeter for improved imaging. But the same recessed midrange. The Firebird solved this problem but cost a lot more. Nowadays it is shocking what you can get for a couple grand from Tekton, much better and a fraction of the price.
Open baffle you eliminate the cabinet but are still using the same old driver technology.