low pass filter for subwoofer

[anit_y]

hello everyone................


i want schematic diagram of low pass filter for a band of 50hz to 500hz.
i am going to use it in subwoofer amplifier at the input side.



waiting for reply

 

[Audioguru]

A second-order lowpass active filter can use a dual pot to adjust its cutoff from 50Hz to 500Hz.

 

[adinogcas]

You can download FILTERPRO from TI to design the circuit. You can download from the attachment or visit TI website.

**broken link removed**

 

[Audioguru]

I have never seen Filter- Pro program make a simple but good Sallen and Key second-order filter with two RC values the same or wirh one resistor or capacitor simply double the value of the other one.

 

[anit_y]

thanks Audioguru for u r reply.


actually i am weak in hardware, will u able to post detail circuit diagram of second order low pass filter.




waiting for u r reply..............

 

[Audioguru]

Here is a lowpass filter with a Butterworth flat response then a cutoff at 102Hz.