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Lowpass filter for subwoofer


remla

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They are certainly not ceramics. With a closer look by enlarging the picture, I see these three are not all the same capacitor type. The 39 pf has a different appearance. The 100 nf caps are tantalum and the 39 pf cap is a silver mica.
In looking at the schematic this also makes sense due to the purpose of each.

MP

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Use what you want, but your picture doesn't even agree with your statement. Sure looks like the more squared silver mica than the very small round ceramic to me.
;D

All fun aside, the silver mica will be better. I use them in microcontroller crystal applications where more precision of frequency is required than what a ceramic will give. Silver Mica is not an "old" cap. They are widely used in everyday electronics.

MP

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