Trying to make a low pass filter

[jsbush]

I heard that if you put a capacitor across your speaker wires the high frequencies will pass through the cap rather then go to the speaker.

I tried it with different size caps from 100uF to 3300uF, and there are still a lot of high frequencies going to the sub.


Any help would be greatly appreciated.
Thanks

 

[Extrarius]

Capacitors are actually better at filtering low frequency noise out, because they stop a DC current and let AC pass almost freely through.

For a low pass filter, you need some kind of inductor. You can get toroidal inductors pretty cheap, but I've no idea what measurements it would need to be most usefull for your application.

 

[jteef]

Originally posted by: jsbush
I heard that if you put a capacitor across your speaker wires the high frequencies will pass through the cap rather then go to the speaker.

I tried it with different size caps from 100uF to 3300uF, and there are still a lot of high frequencies going to the sub.


Any help would be greatly appreciated.
Thanks

you should go with the inductor route. while the capacitor method works in theory, connecting your amp to a capacitor tends to make it oscillate and explode. Also, you'll only get a 1st order effect with just one capacitor, so high frequencies will still come through with audible volume.

 

[merlocka]

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