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<blockquote data-quote="Dafaseles" data-source="post: 8760079" data-attributes="member: 681482">First you adjust your gain. If you don&#039;t know the max, undistorded volume of your head unit, usually 3/4&#039;s of the way up is a good spot to use. Here&#039;s a link on how to set your gain with a digital multimeter[MEDIA=youtube]2eRYzXBmWq8[/MEDIA]Setting your gain is number 1. Just setting your gain too high could have been the reason you smoked your sub. Second, you have the LPF (low pass filter). This knob starts to cut the higher frequencies than what is set out from going to your sub. Usually, people set this around 80 hz. I know it doesn&#039;t say 80 on the dial. You can try to guess where it is, or download an 80 hz test tone, turn up the head unit,&nbsp; then slowly move the knob from right to left. Once you hear a slight drop off from the test tone being played, turn the knob back to the point where it starts playing full blast again. That should get you in the ballpark. Then the subsonic filter. This does the opposite of what the LPF does. It will only let frequencies higher than the knob setting pass through to the subwoofer. If you know the tuning of the enclosure you have your sub in, I&#039;ve always set that knob half an octave below the tuning of the box. So if the box is tuned to 32 hz...32÷2=16. 16 hz is a full octave below tuning. 16÷2=8. So you take that 8, add it to the 16, you get 24 hz. So you can set the subsonic filter at 24 hz. Then you would download a 24 hz test tone, and do the same process as the LPF, except you would start with turning the knob from left to right. If you don&#039;t know the box tuning, if you set it to around the low to mid 20&#039;s, you should be fine. Bass boost completely to the left. Off. All that does is heighten the potential of clipping to your subwoofer. I recommend not using it. The knob to the left of the bass boost is just to adjust what frequency is being boosted by the bass boost knob. So if you have the bass boost off, you don&#039;t have to worry about that knob</blockquote>

[QUOTE="Dafaseles, post: 8760079, member: 681482"] First you adjust your gain. If you don't know the max, undistorded volume of your head unit, usually 3/4's of the way up is a good spot to use. Here's a link on how to set your gain with a digital multimeter [MEDIA=youtube]2eRYzXBmWq8[/MEDIA] Setting your gain is number 1. Just setting your gain too high could have been the reason you smoked your sub. Second, you have the LPF (low pass filter). This knob starts to cut the higher frequencies than what is set out from going to your sub. Usually, people set this around 80 hz. I know it doesn't say 80 on the dial. You can try to guess where it is, or download an 80 hz test tone, turn up the head unit, then slowly move the knob from right to left. Once you hear a slight drop off from the test tone being played, turn the knob back to the point where it starts playing full blast again. That should get you in the ballpark. Then the subsonic filter. This does the opposite of what the LPF does. It will only let frequencies higher than the knob setting pass through to the subwoofer. If you know the tuning of the enclosure you have your sub in, I've always set that knob half an octave below the tuning of the box. So if the box is tuned to 32 hz...32÷2=16. 16 hz is a full octave below tuning. 16÷2=8. So you take that 8, add it to the 16, you get 24 hz. So you can set the subsonic filter at 24 hz. Then you would download a 24 hz test tone, and do the same process as the LPF, except you would start with turning the knob from left to right. If you don't know the box tuning, if you set it to around the low to mid 20's, you should be fine. Bass boost completely to the left. Off. All that does is heighten the potential of clipping to your subwoofer. I recommend not using it. The knob to the left of the bass boost is just to adjust what frequency is being boosted by the bass boost knob. So if you have the bass boost off, you don't have to worry about that knob [/QUOTE]

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