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Old 15th August 2011, 07:09 AM   #11
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The 2.2 F value sets the highpass frequency , which would be around ˜10 Hz .
For values till 4.7 F it's ok to use polyprop or polyester caps instead of electrolitycs because of the size . So if you need to change the highpass frequency point ,you can choose values well under 2.2 F .Resistor remains unchanged ; also , the circuit that follows would probably have another capacitor at its input.
But this is for passive filters circuits . Probably the ACEQX has also a fixed highpass , I mean ,those resistors on the back of the board would suggest that they could be changed if needed .Are those 12 K ?
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