This is what I am talking about.
"6.0 Attenuation Networks
Updated 05 Nov 2001 - a reader pointed out that I had made an error in the woofer sensitivity calculation, so this section has been revised - with the correct information this time. My apologies for any inconvenience.
It is rare that the woofer and tweeter (or midrange driver) will have the same sensitivity (i.e. efficiency). The woofer should have the lowest efficiency, since it will require the most power, and any network that reduces the level to the woofer will absorb a disproportionately high power, and will adversely affect the damping factor.
The driver selection is very important - ideally, all drivers will have the same efficiency, and no attenuation will be needed. In the real world, this will rarely be the case. Attenuator networks are a necessary evil - it is immeasurably better not to use them at all, but they cannot be avoided unless the drivers have exactly the same sensitivity."
Any body who knows this stuff feel free to check this sight to see if its credible
http://sound.westhost.com/lr-passive.htm
Has this been considered in the khorn?