That's a hard remark to follow... don't know as discussion about mere drivers can compare.
But I'm pretty sure, for instance, if the M3ti was had an extra M2ti woofer in it,
- It'd be of a slightly lower impedence
- it'd be slightly more efficient
but, moving into sound quality,
- if the crossover engineering was done well, it'd have a smoother frequency response, especially in the upper-midrange (more evident at lounder levels)
- theoretically it'd have a better low-end response, as mid-range stress would be taken off the bottom woofer
However, if you really wanted to you could make a sub woofer reproduce up to 20khz (it'd take a whole lot of power, and you'd run into .... problems, but it's possible). It could be that the benefits I've stated would be fairly trivial for the M23- not enough to justify the increased manufacturing cost. *But* they would be there in some quantity.
M23!! M23!!
