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<blockquote data-quote="i2ain2thunder" data-source="post: 7751883" data-attributes="member: 631331">gain settings are for sending your subs the recommended RMS wattage (or user choice).&nbsp; You should be setting your gain according to your sub power handling.&nbsp; i&#039;m sure if you use the search feature of this site and just type gain setting you&#039;ll find enough threads on how to do so.&nbsp; 20$ Digital Multimeter can get you close.&nbsp; If you want max power with as close to 0 distortion as possible an oscilloscope is necessary but they are very pricey.&nbsp; Most of us just use a DMM.Subsonic filters remove any frequencies that may be too low for safe operation of your subwoofer. I personally don&#039;t care for them but most would set theirs around 20hz.LPF Low Pass Filters allow any frequency below the setting threw.&nbsp; Depends on the octave of your slope and your blending needs with speakers, but generally speaking a setting anywhere between 70-90hz is pretty common as bass is a lot harder for your brain to tell direction at those lower frequencies.&nbsp; So it becomes less apparent to listeners that the bass is coming from the rear.</blockquote>

[QUOTE="i2ain2thunder, post: 7751883, member: 631331"] gain settings are for sending your subs the recommended RMS wattage (or user choice). You should be setting your gain according to your sub power handling. i'm sure if you use the search feature of this site and just type gain setting you'll find enough threads on how to do so. 20$ Digital Multimeter can get you close. If you want max power with as close to 0 distortion as possible an oscilloscope is necessary but they are very pricey. Most of us just use a DMM. Subsonic filters remove any frequencies that may be too low for safe operation of your subwoofer. I personally don't care for them but most would set theirs around 20hz. LPF Low Pass Filters allow any frequency below the setting threw. Depends on the octave of your slope and your blending needs with speakers, but generally speaking a setting anywhere between 70-90hz is pretty common as bass is a lot harder for your brain to tell direction at those lower frequencies. So it becomes less apparent to listeners that the bass is coming from the rear. [/QUOTE]

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