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Sub-woofer Filter Design - LPF
Sub-woofer Filter Design - LPF
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Old 8th September 2012, 12:28 PM   #1
udhay_cit is offline udhay_cit  India
diyAudio Member
Join Date: Feb 2008
Default Sub-woofer Filter Design - LPF

Here the very famous subwoofer filter circuit & also my PCB 3D component view.

I didn't check the circuit & quality. I hope it will work. After my testing i will post the PCB layout(single layer).... Meanwhile any commands about the circuit performance or any experience with this circuit.....

If any body interested in this Layout(Test it your self), Please give me a email..
I don't want to post the layout without test......

My contact embudhay@gmail.com

Attached Images
File Type: png top.png (165.4 KB, 109 views)
File Type: png side.png (107.2 KB, 103 views)
File Type: png side 2.png (99.3 KB, 100 views)
Attached Files
File Type: pdf subfilter.pdf (81.4 KB, 96 views)
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Old 9th September 2012, 12:05 PM   #2
djk is offline djk
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Join Date: Feb 2001
Location: USA
It looks OK for what it is.

I did a variation that used an inverting input buffer as a three input summer. This allowed me to trim the .1 LFE input resistor for a different level than the 2.0 stereo input.

The level of the sub could be set for best sound on 2.0 (music), and then when the .1 LFE kicked in on a movie it could be adjusted to a higher level. Thus the switching was automatic.
Candidates for the Darwin Award should not read this author.
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