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<blockquote data-quote="honkyg" data-source="post: 8587536" data-attributes="member: 606879">how attenuated the signal amplitude is in decay (roll off) or attack (roll in) before or after the crossover point,.. taking an arbitrary crossover point, lets say 80hz,.. attenuation doubles for every octave (doubling or halving of frequency) above or below the crossover point, so high passing at 6db per octave will roll the lower frequencies to effectively attenuate the signal by 6db at 40hz (3db at 60hz - half octave, 12 db at 20 hz- 2 octaves, 24db at 10hz - 3 octaves), whereas low passing will roll the higher frequencies off at a rate of 6db at 160hz (3db at 120hz - half octave, 12db at 320hz - 2 octaves, 18db at 480hz - 2.5 octaves, 24db at 640hz - 3 octaves). higher db/octave slopes will attenuate at a faster rate over the same frequency band.a good dsp will have the ability to adjust the slope on each channel, allowing for overlapping and underlapping of crossover points,.. for instance, a midbass high passed at 80hz and the sub low passed at 120hz (overlapping) if there&#039;s a dip in response around the 100hz region. just the inverse configuration would be underlapping needed if theres a peak.also, different slope rates can be used on either side of the crossover point to blend two corresponding drivers&#039;. takes alot of trial and error without an rta and all the different configurations you can apply, but what sounds best to your ear is most important, imo.</blockquote>

[QUOTE="honkyg, post: 8587536, member: 606879"] how attenuated the signal amplitude is in decay (roll off) or attack (roll in) before or after the crossover point,.. taking an arbitrary crossover point, lets say 80hz,.. attenuation doubles for every octave (doubling or halving of frequency) above or below the crossover point, so high passing at 6db per octave will roll the lower frequencies to effectively attenuate the signal by 6db at 40hz (3db at 60hz - half octave, 12 db at 20 hz- 2 octaves, 24db at 10hz - 3 octaves), whereas low passing will roll the higher frequencies off at a rate of 6db at 160hz (3db at 120hz - half octave, 12db at 320hz - 2 octaves, 18db at 480hz - 2.5 octaves, 24db at 640hz - 3 octaves). higher db/octave slopes will attenuate at a faster rate over the same frequency band. a good dsp will have the ability to adjust the slope on each channel, allowing for overlapping and underlapping of crossover points,.. for instance, a midbass high passed at 80hz and the sub low passed at 120hz (overlapping) if there's a dip in response around the 100hz region. just the inverse configuration would be underlapping needed if theres a peak. also, different slope rates can be used on either side of the crossover point to blend two corresponding drivers'. takes alot of trial and error without an rta and all the different configurations you can apply, but what sounds best to your ear is most important, imo. [/QUOTE]

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