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<blockquote data-quote="XTRProBoy" data-source="post: 2449076" data-attributes="member: 571009">You don&#039;t really need the subsonic filter if you have a sealed box.&nbsp; If the amp had a facility similar to that of Orion&#039;s IntelliQ or Infinity&#039;s DBO, then you would set it to a number above the Fs of the driver, but really with a sealed box and no feature like that, I&#039;d leave it off altogether.Yes, unless the amp driving the sub has a better slope than the HU in which case I&#039;d use the amp LPF instead.&nbsp; Or you could cascade them to get more slope (i.e. use both the LPF on the HU and on the amp) but that will modify the crossover freqeuncy slightly as well.&nbsp; (I think it will depress the LP xover frequency a bit, but give you double the slope.)&nbsp; On the speaker side (the HPF) I&#039;d let the HU do it and not bother with the amp.Yeah if it&#039;s just two amps, you&#039;ll be fine running off the one remote wire.&nbsp; 3 is usually acceptable too, but at 3 I&#039;d prefer to use a relay on it as it&#039;s cheap insurance.&nbsp; Anyway with only 2 things connnected to it, you&#039;ll be fine.</blockquote>

[QUOTE="XTRProBoy, post: 2449076, member: 571009"] You don't really need the subsonic filter if you have a sealed box. If the amp had a facility similar to that of Orion's IntelliQ or Infinity's DBO, then you would set it to a number above the Fs of the driver, but really with a sealed box and no feature like that, I'd leave it off altogether. Yes, unless the amp driving the sub has a better slope than the HU in which case I'd use the amp LPF instead. Or you could cascade them to get more slope (i.e. use both the LPF on the HU and on the amp) but that will modify the crossover freqeuncy slightly as well. (I think it will depress the LP xover frequency a bit, but give you double the slope.) On the speaker side (the HPF) I'd let the HU do it and not bother with the amp. Yeah if it's just two amps, you'll be fine running off the one remote wire. 3 is usually acceptable too, but at 3 I'd prefer to use a relay on it as it's cheap insurance. Anyway with only 2 things connnected to it, you'll be fine. [/QUOTE]

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