:LOL. Indeed! It also has to do with damping, distortion; especially intermodulation as well as harmonic. Resolution of sub-signals not just the main one. Phase/time coherence. As well as how they couple to the room they are being played in, this includes positioning.
There is an awful lot of dependence on those air flapping motors to deliver the quality they do. This is not woo-woo as the Thiele-Small parameters, and anechoic chamber characteristics do define how a speaker will sound in any given room with about 90% confidence.
What most people hear however is not the speaker's but the room's response that is energised by the speakers.
Completely agree.
I've been auditioning a lot of headphones lately also, where the room is not so much of a factor, and some ear-speakers (MySphere3, AKG K-1000), which are truly fascinating as a way of getting as direct a sound as possible, free from room influence. Sadly, both the ear-speakers have other flaws, which make judging what is contributing what difficult to judge, but one can definitely hear something going on with these, which isn't possible with speakers in the average room.
What of the now rather antique (at least on paper) MRC? Has anyone tried incorporating more recent, and well-reviewed, products such as Dirac within a Meridian eco-system? I feel this might be possible in a 2-channel setup, but more involved (to say the least) when attempting a multichannel setup (and I assume nigh-on impossible for synthesised multichannel from a 2-channel source, e.g. Trifield), but I would be interested to hear if anyone's tried and what the results were like...
Room correction aside, I still find Trifield far superior to plain stereo in my setup/room, and I wonder how much of this is due to a) mitigating room interference in various ways, b) offloading deep bass from the mains to a sub, freeing the drivers to work better/lower distortion within the remaining range, etc., etc. Fascinating subject.