I must applaud your no nonsense explanations
nepenthe - yes they are great are'nt they. I visited another forum member's home ( a different forum) to buy a spare pair of the G/heils and listened to his ESS speakers and within a minute I knew I had not made a wasted journey.
Lenni - if you know nothing about speaker building, should'nt you be asking questions rather than making pronouncements. OB - open baffle = no box = no colourations. Only room acoustics to integrate with.
I phoned my mate in the Netherlands about this very subject last night and he had difficulty understanding that massive power amps are'nt nec. because energy is being optimised with AXOs and not wasted in heat generation.
Mauricio has only hinted at the advantages of AXOs - for those who want to know and for those that 'think' they know - go read Rod Elliot's article on active v passive. There almost certainly are other fine explanations about this but Rod writes in a no nonsense way - typical Aussie. You also have access to a computer programme he supplies on his site to work out values for AXOs and he provides very reasonable PCBs to build them with.