I think loudspeakers are the weakest link in the chain. There is no way loudspeakers will move the amount of air like a 32' open wood at large volumes. When digital organs have been used at the Royal Albert Hall, they always fail to impress on low pedal notes. It just does not happen. And it cant happen. Loudspeaker cones and their suspension just cant handle the punishment at high sound levels at 16hz. to try and make it sound like the real thing.