Quote:
Originally posted by bossobass:

if you use a 40hz 12db/octave (2nd order) high pass filter on (the signal to be amplified and then sent to) your mains, won't the roll-off be at 36 db/octave (B6 alignment), regardless of the natural roll-off of the drivers?


All the information I have indicates this is not true. Why would you say so?

While amplitude vs. power response is a tricky thing it has more to do with alignment than slope. Every crossover design and electronics book I've got indicate that every order of complexity adds 6db per octave to the filter slope, regardless of if it is pre or post amp, electrical or acoustical.

Most systems have a (fairly) predictable slope as they cutoff.
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Charlie