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Junior Varsity
Do you take your crossover for granted? [Powered Speakers]
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<blockquote data-quote="Greg Cameron" data-source="post: 122577" data-attributes="member: 42"><p>Re: Do you take your crossover for granted? [Powered Speakers]</p><p></p><p>Many newer subs offer selectable crossover points, so things are improving in that regard. But they're not usually sweepable. So I generally opt for outboard processing to fine tune the crossover point and also allow the ability to under or overlap crossover points. That said, I usually run an analog outboard crossover for self powered top/sub split though I have DSP available if I'm working with speakers that need more EQ or delay. As far as mixing brands and using built in crossovers, that shouldn't really matter if the crossover point is correct and uses the right slope. A 24 or 12dB per octave LR alignment should have the same behavior on various brands. And on the subject of tops vs. sub crossover points, it's never going to be totally correct unless the tops are sitting within a 1/4 wavelength of the all overlap frequencies. Even speakers sitting on poles with the subs placed directly below are going to have some errors. If you're running subs on the ground and tops flown or have subs center clustered, you're going to have issues too. Say you're using 100Hz as a crossover point. 1/4 wavelength is 2.8 ft @ 100Hz. And though you may be using a 24dB/oct. filter, you're still getting energy above that point from the sub(s) that's interacting with the tops. This is one reason why I use the lowest possible crossover point my tops will sound ok with - to reduce the negative interference between tops and subs. If the tops are struggling, I'll bump up the crossover point accordingly. But in my experience, lower crossover points tend to sound better overall if the LF drivers in the tops can handle it. My regular rig runs with a high pass of 60Hz on the tops and ~55Hz-65Hz on the subs depending on how much of a bump I want at the crossover. I get better coupling between the flow tops and ground subs and the subs don't sound boxy with a LPF way down there. With smaller tops, I try not to go down below 80Hz if the tops are happy in that range. Otherwise I'll bump up the high pass to 90-100Hz if I need more output.</p><p></p><p>As far as published data for pass filters. It might be helpful for a baseline. But in the end it's room and content dependent for me as far as what I'll actually wind up with. </p><p></p><p>.</p></blockquote><p></p>
[QUOTE="Greg Cameron, post: 122577, member: 42"] Re: Do you take your crossover for granted? [Powered Speakers] Many newer subs offer selectable crossover points, so things are improving in that regard. But they're not usually sweepable. So I generally opt for outboard processing to fine tune the crossover point and also allow the ability to under or overlap crossover points. That said, I usually run an analog outboard crossover for self powered top/sub split though I have DSP available if I'm working with speakers that need more EQ or delay. As far as mixing brands and using built in crossovers, that shouldn't really matter if the crossover point is correct and uses the right slope. A 24 or 12dB per octave LR alignment should have the same behavior on various brands. And on the subject of tops vs. sub crossover points, it's never going to be totally correct unless the tops are sitting within a 1/4 wavelength of the all overlap frequencies. Even speakers sitting on poles with the subs placed directly below are going to have some errors. If you're running subs on the ground and tops flown or have subs center clustered, you're going to have issues too. Say you're using 100Hz as a crossover point. 1/4 wavelength is 2.8 ft @ 100Hz. And though you may be using a 24dB/oct. filter, you're still getting energy above that point from the sub(s) that's interacting with the tops. This is one reason why I use the lowest possible crossover point my tops will sound ok with - to reduce the negative interference between tops and subs. If the tops are struggling, I'll bump up the crossover point accordingly. But in my experience, lower crossover points tend to sound better overall if the LF drivers in the tops can handle it. My regular rig runs with a high pass of 60Hz on the tops and ~55Hz-65Hz on the subs depending on how much of a bump I want at the crossover. I get better coupling between the flow tops and ground subs and the subs don't sound boxy with a LPF way down there. With smaller tops, I try not to go down below 80Hz if the tops are happy in that range. Otherwise I'll bump up the high pass to 90-100Hz if I need more output. As far as published data for pass filters. It might be helpful for a baseline. But in the end it's room and content dependent for me as far as what I'll actually wind up with. . [/QUOTE]
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