Speaker relative efficiency/sensitivity when using a high pass filter


Is there a formula/algorithm/rule of thumb for calculating how a speaker's power requirements might change when the lower frequencies are handled by a subwoofer?  Specifically for a ported speaker with a supposed frequency response down to 35Hz and an a 89dB sensitivity with a second order crossover at 80Hz. I know it goes down but by how much? I recognize that power requirements increase as frequency decreases but is the difference enough to allow for a less powerful amp? I would think so.

 

128x128tcutter

@tcutter what are you using to high pass your speakers at 80 hz? I’m interested in doing the same thing. I want to relieve my speakers of some of that bass and open up my amp options. Thanks.

I love how @phusis refutes my claim, and then in a couple of paragraphs refutes himself.  Hahahaha, have at it guys, I've said my peace.

100 Watts is not enough, but it is enough.. ... but you can't tell by wattage... Funny.