Three questions for the cognoscenti

[Lewis Moon]

Three questions that I cannot find good, definative answers for:
(Perhaps I'm not using the right search terms....)

1) Why a seperate tweeter enclosure (like the swans and the Wharfedale Evo2)? I believe that the designers are taking the tweeter off the baffel....why?

2) Why two mid/woofers? Especially when both use the same XO?
I've seen them in MTM and TMM configurations. I looked for this one and found better off axis performance but is that all?

3) Why the asymetrical placement of speakers on the baffle?

[SY]

1. Diffraction.
2. Vertical polar pattern and lower distortion at higher SPL.
3. Diffraction.

The placement of drivers on a baffle causes frequency response irregularities; items 1 and 3 are generally attempts to minimize these effects. There are some excellent freeware programs which allow you to calculate the effect of driver position on the baffle on frequency response- FRD Consortium has published several that I've used, and they are very educational to play with.

[sdclc126]

TMM is also a 2.5 way, as opposed to the 2 way for MTM - one woofer is midbass and the second is usually a first order electrical bass.