Normal
The roll off is 12 dB but the shape probably will not match a Butterworth especially in this case where the LF section is more or less a 4th order band pass tuned around 500Hz.This tuning produces a peak of about 8-10 dB that has to be corrected, but you do get more SPL and in this case the pattern control I wanted because of the the location of the two LF exits.I EQ-ed it flat with the Butterworth shape roll off so that when I applied another 12 dB Butterworth (electrical crossover) I ended up with a 24 dB LR.In practice I just took my best guess, added a 12 dB Butt electrical filter and fine tuned the end result to 24 dB LR
The roll off is 12 dB but the shape probably will not match a Butterworth especially in this case where the LF section is more or less a 4th order band pass tuned around 500Hz.
This tuning produces a peak of about 8-10 dB that has to be corrected, but you do get more SPL and in this case the pattern control I wanted because of the the location of the two LF exits.
I EQ-ed it flat with the Butterworth shape roll off so that when I applied another 12 dB Butterworth (electrical crossover) I ended up with a 24 dB LR.
In practice I just took my best guess, added a 12 dB Butt electrical filter and fine tuned the end result to 24 dB LR
