sub barely moves?

[BassMunky]

can i use this method to set the ssf and the lpf?

Setting Subsonic Filter (SSF)

Subsonic filter reduces the amplitude of certain frequencies depending on where it's set.

If your using a sealed enclosure, then turn the ssf all the way counter-clockwise.

So your enclosure is ported? Your going to set the ssf to the frequency your box is tuned to.

Let's use 30hz as an example...

disconnect speakers

turn ssf counter-clockwise until it's considered "off"

play 30hz tone at volume 10.

Measure the voltage output

Let y = voltage output * 0.707

turn ssf clockwise until voltage output now matches "y"

Now your ssf is set.

Setting Low Pass Filter (LPF)

LPF does the exact same thing as the ssf but it's reducing higher frequencies that we don't want our speakers to play.

Depending on the speaker your using and it's frequency response you'll want to set the lfp filter higher or lower then others.

For this article were going to be setting it to 80hz for a subwoofer.

disconnect speakers

turn lpf clockwise until it's considered "max"

play 80hz tone at volume 10.

Measure the voltage output

Let y = voltage output / 0.707>

turn lpf counter-clockwise until voltage output now matches "y"

Now your lpf is set

Edited December 17, 2011 by BassMunky