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Junior Varsity
Do you take your crossover for granted? [Powered Speakers]
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<blockquote data-quote="drew gandy" data-source="post: 122718" data-attributes="member: 880"><p>Re: Do you take your crossover for granted? [Powered Speakers]</p><p></p><p></p><p>When you flip the polarity between a sub and top the difference you hear is usually because one position has more (or different) cancellation than the other. In other words, there is a change in frequency response between the 2 positions. With very steep filters the range of overlap where a cancellation could potentially occur is very narrow. Thus, steep filters mean less trouble with changes in frequency response (that might be a bit simplified but that's the gist). The audibility of phase shift alone (without changes in frequency response) is another deep subject. The research so far seems to show that audibility is dependent upon signal source (what kind of sounds are we listening to) and once room ambience is added to a signal the audibility of phase discrepancies diminishes greatly. Further, study subjects generally can't describe differences in phase as better or worse, meaning that phase coherence isn't necessarily a requirement for everyone to have a good time. But, we need more research. I don't think we're looking at the subject from the right perspective yet. </p><p></p><p>This goes back to the idea that powered speakers are great because you don't have to think about them; they just work. Gone is all that cursing when you realize that the dsp in the rack doesn't have the right presets for the speakers you have or when someone wired the rack in some strange way and signals aren't going to the right places!</p></blockquote><p></p>
[QUOTE="drew gandy, post: 122718, member: 880"] Re: Do you take your crossover for granted? [Powered Speakers] When you flip the polarity between a sub and top the difference you hear is usually because one position has more (or different) cancellation than the other. In other words, there is a change in frequency response between the 2 positions. With very steep filters the range of overlap where a cancellation could potentially occur is very narrow. Thus, steep filters mean less trouble with changes in frequency response (that might be a bit simplified but that's the gist). The audibility of phase shift alone (without changes in frequency response) is another deep subject. The research so far seems to show that audibility is dependent upon signal source (what kind of sounds are we listening to) and once room ambience is added to a signal the audibility of phase discrepancies diminishes greatly. Further, study subjects generally can't describe differences in phase as better or worse, meaning that phase coherence isn't necessarily a requirement for everyone to have a good time. But, we need more research. I don't think we're looking at the subject from the right perspective yet. This goes back to the idea that powered speakers are great because you don't have to think about them; they just work. Gone is all that cursing when you realize that the dsp in the rack doesn't have the right presets for the speakers you have or when someone wired the rack in some strange way and signals aren't going to the right places! [/QUOTE]
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Do you take your crossover for granted? [Powered Speakers]
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