LM3875 low pass help

boptura · 25th August 2008, 02:21 PM

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

jackinnj · 26th August 2008, 11:30 PM

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.

25th August 2008, 02:21 PM	#1
boptura diyAudio Member Join Date: Jun 2004 Location: Italy	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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26th August 2008, 11:30 PM	#2
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	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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