F4ier:

So there is a hole! Thought so.

Okay, suppose I wanted to dodge this by keeping the woofer a 12 dB/octave slope but making the tweeter:

A) A 6 dB/octave network. Does this eliminate the hole? If so, how many dB should the tweeter be at crossover?

B) An 18 dB/octave slope. Does this eliminate the hole? If so, how many dB should the tweeter be at crossover?

I have read some loudspeaker designers are less than enthusiastic about having one driver's slope even order and the other driver's slope odd order, but it seems to me a nice way to dodge a problem. Have you heard of any big problems with making one slope odd and the other even?

I fully realize that there is no such thing as a perfect passive crossover. If you want an advantage in one direction, you have to give up something else. Everything is an uneasy compromise.

I'm just looking for reasonably flat on-axis and off-axis response. I really don't care that much about a 1 dB ripple here or there. That is not really hearable to a normal person, and the drivers have ripples themselves.

Finally, I would appreciate any thoughts you might have on this related thread:

http://www.diyaudio.com/forums/showthread.php?threadid=4591