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<blockquote data-quote="John Roberts" data-source="post: 145511" data-attributes="member: 126">Re: Speaker Processing AdviceNah...not stupid. I can&#039;t help much with talking to DSP du jour but I remember filters from 30 years ago when I was designing (analog) crossovers. Those filter alignments are not LR,&nbsp; which use identical stacked 2 pole Butterworth alignments. Staggering the poles above and below the XO point is typical of a Chebyshev alignment. The Chebyshev alignment plays games by trading increased ripple in the passband before roll-off in exchange for&nbsp; steeper slopes in the cut-off region. I don&#039;t think I&#039;ve ever seen Chebyshev used in crossovers (but what do I know <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile&nbsp; &nbsp; :-)"&nbsp; data-smilie="1"data-shortname=":-)" /> ). The LR is popular for how the two bandpasses meld together in the crossover region. The phase lead and lag add up to one full rotation to be back in phase again,,, (at least on paper or for listening to steady state tones). Standard LR alignments are not a bad place to start. JR</blockquote>

[QUOTE="John Roberts, post: 145511, member: 126"] Re: Speaker Processing Advice Nah...not stupid. I can't help much with talking to DSP du jour but I remember filters from 30 years ago when I was designing (analog) crossovers. Those filter alignments are not LR, which use identical stacked 2 pole Butterworth alignments. Staggering the poles above and below the XO point is typical of a Chebyshev alignment. The Chebyshev alignment plays games by trading increased ripple in the passband before roll-off in exchange for steeper slopes in the cut-off region. I don't think I've ever seen Chebyshev used in crossovers (but what do I know :-) ). The LR is popular for how the two bandpasses meld together in the crossover region. The phase lead and lag add up to one full rotation to be back in phase again,,, (at least on paper or for listening to steady state tones). Standard LR alignments are not a bad place to start. JR [/QUOTE]

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