Anyways, I need to design a setup. The setup in question has a Woofer (4.5 ohms where I need it to crossover), a midrange speaker (10 ohms where I need it to cross over), and a tweeter (6.5 ohms where I need it to cross over). One of the speakers (the woofer) has a hump between 300-600 hz, so I need to begin my decent for the crossover before that. For the lower range of the mid, the crossover should be at 600 hz. I would like to use a 2nd order butterworth for all of this with a Q of 0.707.

the higher end is slightly more standard, however, I think i need to use an LPAD filter, because the efficiency of the tweeter is around 6db higher than that of the woofer.

Im starting to design the situation in spice. I have attached what I have so far.

I started to add the LPADs on the midrange speaker, but not the tweeter yet. The problem is that in the graph, the midrange speaker is slanted on the top and I have no idea why. Ive tried using calculators, but every one gives me a different answer. If anyone can help by explaining what I need to do or giving me equations so I can calculate it, that would be great! sorry this is so specific, it is for someone who is extremely particular in what they want. hopefully this doesn't sound too crazy and is possible to do.

Thanks so much and I look forward to hearing from you soon!