so again, why not just have all 10s and have the drivers tuned differently? why would companies make these other drivers sizes if you can achieve the same overall sound using the same size speaker, just tuned differently?
When you tweak one parameter, everything else changes. Hence, it might not be possible to, say, get the specific sound of a K140 in a 10" size because you'd have to essentially start over in the design.
Also, there are different tradeoffs in driver size. Such as dispersion. One 15" driver doesn't have as good dispersion as one 10" driver... but it does have better dispersion than two 10" drivers side by side.
