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<blockquote data-quote="thch" data-source="post: 1453989" data-attributes="member: 562032">lowpass -- passes low notes, like bass.highpass -- passes higher notes, like everything but bass.for some things you might use a lowpass to pass midrange and bass to a 6.5&quot; speaker, and a highpass to send the trebel to the tweeters.the filters are not perfect -- if the filter is set to 80hz-lowpass, then 81hz would still be audible.&nbsp; 100hz may be as well.&nbsp; 200hz might also be audible.&nbsp; 200hz would be less audible then 100, and 100 less then 81, and 81 less then 80.&nbsp; but below 80hz, everything should be about equal (at least in what the amp can control).there are two specs typically used to determine how much freqeuncies near 80hz are affected.&nbsp; slope determines how much 100, 200, ect are attunated.&nbsp; Q affects this as well (but only near 80hz) and also affects how frequencies near 80hz but slightly above are affected.&nbsp; a high Q can give a peak.&nbsp; sometimes this is used as a bass boost.&nbsp; sometimes it is used to smooth the response.</blockquote>

[QUOTE="thch, post: 1453989, member: 562032"] lowpass -- passes low notes, like bass. highpass -- passes higher notes, like everything but bass. for some things you might use a lowpass to pass midrange and bass to a 6.5" speaker, and a highpass to send the trebel to the tweeters. the filters are not perfect -- if the filter is set to 80hz-lowpass, then 81hz would still be audible. 100hz may be as well. 200hz might also be audible. 200hz would be less audible then 100, and 100 less then 81, and 81 less then 80. but below 80hz, everything should be about equal (at least in what the amp can control). there are two specs typically used to determine how much freqeuncies near 80hz are affected. slope determines how much 100, 200, ect are attunated. Q affects this as well (but only near 80hz) and also affects how frequencies near 80hz but slightly above are affected. a high Q can give a peak. sometimes this is used as a bass boost. sometimes it is used to smooth the response. [/QUOTE]

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