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<blockquote data-quote="headless" data-source="post: 1936160" data-attributes="member: 566363">I wouldn&#039;t double crossover any signal at all without doing a ton of graphing + math to figure out what effect it would have. The reason why changing your 24db x-over from 80hz to 350hz effects anything is because the existing 18db crossover slopes from under 80hz to well over 80hz in 18db increments, lowering the volume. Some signal under 80hz is removed, and then as it increases in frequency, more and more is cut out -- at a rate of 18db per octave. If you stack a 24db crossover on it, you end up with a totally different curve on TOP of that...From what i understand, while an 18db/octave crossover hitting -6db @ 80hz might start cutting sound off at 1/3rd of an octave higher, a 24db xover slope&nbsp; would start cutting sound at only 1/4th of an octave higher. So not only is your new crossover effecting bass around AND below the 80hz mark, as you move the 24db crossover slope higher, you are going to hear a change well above 80hz...because the 18db 80hz crossover is still going to be letting through a reasonable amount of (well) above 100hz and the 24db crossover on top of that is going to cut that slow decline off sharply.A signal sent through a 12db crossover that is then sent through another 12db crossover both centered on 80hz is not the same as a 24db/oct crossover...the slope would be different on a single 24db/octave crossover</blockquote>

[QUOTE="headless, post: 1936160, member: 566363"] I wouldn't double crossover any signal at all without doing a ton of graphing + math to figure out what effect it would have. The reason why changing your 24db x-over from 80hz to 350hz effects anything is because the existing 18db crossover slopes from under 80hz to well over 80hz in 18db increments, lowering the volume. Some signal under 80hz is removed, and then as it increases in frequency, more and more is cut out -- at a rate of 18db per octave. If you stack a 24db crossover on it, you end up with a totally different curve on TOP of that... From what i understand, while an 18db/octave crossover hitting -6db @ 80hz might start cutting sound off at 1/3rd of an octave higher, a 24db xover slope would start cutting sound at only 1/4th of an octave higher. So not only is your new crossover effecting bass around AND below the 80hz mark, as you move the 24db crossover slope higher, you are going to hear a change well above 80hz...because the 18db 80hz crossover is still going to be letting through a reasonable amount of (well) above 100hz and the 24db crossover on top of that is going to cut that slow decline off sharply. A signal sent through a 12db crossover that is then sent through another 12db crossover both centered on 80hz is not the same as a 24db/oct crossover...the slope would be different on a single 24db/octave crossover [/QUOTE]

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