Capacitor in series for "bass cut"; hum issues

I would like to have a capacitor in series with the guitar signal as a "bass cut". This will be switched, not connected to a pot. I have tried all sorts of caps & have settled on .002uf or so, that is, two regular .001's in parallel. Thins out the sound a lot but leaves audlble bass notes.

But I get an increased hum, no matter how I wire it, either within the axe, or externally.

Anyone out there know how to kill that humminess?

P.S. This doesn't pertain to any particular guitar; I have tried it recently with various ones and always get that increased hum.

Are you sure you mean you have it in series ??

Should be parallel (switched on)

Are you sure you mean you have it in series ??

Should be parallel (switched on)

That would be for high cut. He wants bass cut.

I have not experienced any hum issues with caps in series. Can you give us more specifics on how you are wiring this?

When you say you've tried it wired in and outside the guitar are you speaking of the same caps? Have you tried any other caps?

Other than the loss of bass frequencies are you noticing an overall volume drop?

When you cut/block the bass portion of the guitar's output signal you will naturally see an decline in the signal to noise ratio (most noise being 120 hz or higher harmonics thereof.) Turn up the amp to compensate for reduced volume and the results will be more noise.