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<blockquote data-quote="Decado" data-source="post: 1796072" data-attributes="member: 562098">Hey, with this new HCCA-D2400 there are some settings on this that are pretty new to me, notably the subsonic filter, and i have some questions about it, I talked to hccafan about some of the stuff but i&#039;m still a little confused and don&#039;t want to bug him anymore.&nbsp; Now for reference i have a 15&quot; sx in 4 ft^3 and tuned to 33hz.First off, when i set the lpf, on this amp, it goes down to 30hz, and my last amp it went down to 45 (which is where i had it set), but then he had said that i should set it at about 70-80hz (which surprised me), does this sound about right?&nbsp; And when i set that, do i use that 70-80hz for the test tone when i set the gains on the amp?Second, when i set the subsonic filter, people have said to set it at port tuning or slightly lower, how much lower exactly can i go with it?Third, there&#039;s an intelli Q setting where i can boost between the subsonic frequency and the lpf frequency from 0-10db, should i just leave this alone, or is this a good idea to bring this up somewhat?Lastly, when setting these, how do i know when i&#039;m at the right frequency?&nbsp; Is there some way i can test this with a dmm or ammeter, because it&#039;s pretty **** hard to eyeball the frequency since it just shows the minimum and maximum.</blockquote>

[QUOTE="Decado, post: 1796072, member: 562098"] Hey, with this new HCCA-D2400 there are some settings on this that are pretty new to me, notably the subsonic filter, and i have some questions about it, I talked to hccafan about some of the stuff but i'm still a little confused and don't want to bug him anymore. Now for reference i have a 15" sx in 4 ft^3 and tuned to 33hz. First off, when i set the lpf, on this amp, it goes down to 30hz, and my last amp it went down to 45 (which is where i had it set), but then he had said that i should set it at about 70-80hz (which surprised me), does this sound about right? And when i set that, do i use that 70-80hz for the test tone when i set the gains on the amp? Second, when i set the subsonic filter, people have said to set it at port tuning or slightly lower, how much lower exactly can i go with it? Third, there's an intelli Q setting where i can boost between the subsonic frequency and the lpf frequency from 0-10db, should i just leave this alone, or is this a good idea to bring this up somewhat? Lastly, when setting these, how do i know when i'm at the right frequency? Is there some way i can test this with a dmm or ammeter, because it's pretty **** hard to eyeball the frequency since it just shows the minimum and maximum. [/QUOTE]

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