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Old 25th August 2008, 02:21 PM   #1
boptura is offline boptura  Italy
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Question LM3875 low pass help

Hi,
i will try to use my nigc as bass amplifier, adding a 12dB low pass filter...

any advise on how to prevent impedance or other chip issues ?

where is the best place to insert a volume pot ?


thanks, paolo.


http://diyaudioprojects.com/Chip/Bea...75-chipamp.png

http://www.t-linespeakers.org/tech/f...ssiveHLxo.html
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Old 26th August 2008, 11:30 PM   #2
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Paulo

Go to the Texas Instruments website and download a copy (free) of Filter-Pro -- you can use the LM3875 as an LPF for a subwoofer and FilterPro will help you derive the values of C and R.
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