Subwoofer Low pass filter - LFE setting? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 3 Old 05-13-2019, 05:47 PM - Thread Starter
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Subwoofer Low pass filter - LFE setting?

Hi there,

My subwoofer has the LPF (low pass filter) knob with 40hz to 120hz and currently the dial is turned all the way on "LFE" this was the default when I got it.

Should I be leaving it on LFE? Or turning it back to 80hz for example.
I'm confused what exactly the difference is between the 2?
What does it mean if I leave it on LFE?
Thanks
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post #2 of 3 Old 05-13-2019, 06:21 PM
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The owner's manual will likely indicate that setting the LPF control on the sub to "LFE" means the control is bypassed. If your AVR handles bass management (and any newer AVR will), generally-speaking you do want to bypass the sub's LPF.

If, for example, your AVR sends all bass content below 80Hz to the sub and you set the sub's LPF to:
- 80Hz you're (arguably) unnecessarily adding a second 80Hz filter to the content;
- higher than 80Hz, nothing happens (all content below the LPF setting - which is all the content the sub received - gets played by it);
- lower than 80Hz, you're filtering out content between 80Hz and whatever you set the LPF to.

Last edited by eljaycanuck; 05-13-2019 at 06:27 PM.
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post #3 of 3 Old 05-13-2019, 06:52 PM
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Quote:
Originally Posted by mraussieav View Post
Hi there,

My subwoofer has the LPF (low pass filter) knob with 40hz to 120hz and currently the dial is turned all the way on "LFE" this was the default when I got it.

Should I be leaving it on LFE? Or turning it back to 80hz for example.
I'm confused what exactly the difference is between the 2?
What does it mean if I leave it on LFE?
Thanks
Here's a good read for you;
III-C: Cascading Crossovers:
From this Guide;
Guide to Subwoofer Calibration and Bass Preferences


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