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Message: <blockquote data-quote="Jeffdachef" data-source="post: 8265021" data-attributes="member: 650438">if you like pushing your speakers to extremely loud levels and would like to prolong the life if your mids, then high pass filter is your friend. It attenuates(weakens the signal) the lower bass frequencies that your speakers arent meant to hit so more power can be focused on midbass and midrange. Leave it at 80hz if its daily listening, but when you really push your system hard, put it at 125hz to ensure longevity of your midrange speakers.for the low pass filter, i normally just use the head unit's low pass filter and open it real wide on the amp pretty much not using the amp's LPF. Crossovers on a good head unit do the job better since the head unit is the origin source of the audio signal.</blockquote>

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