I wish to make a simple (passive?) low pass filter that is placed after the amplifier, i.e. somewhere along the speaker out wires. At the moment there are problems with the resistor reducing the volume level too much. The capacitor seems to do nothing. I used the 1/2piRC formula to get values for 2.4K resistors and 470nF capacitors. From what I have discovered in my projects, passive low pass filters only work before the amplifier stage and high pass filters work only after the amplifier stage (just a capacitor in series seems to work). This is really quite annoying and somewhat confusing.
Does a low pass filter work when placed after the amplifier stage, or am I doing something wrong?
Any help greatly appreciated,
E.E.
Does a low pass filter work when placed after the amplifier stage, or am I doing something wrong?
Any help greatly appreciated,
E.E.