Cheers heaps omodo!
Oh yes I semi-recall learning that at uni! Pity I dropped out of electrical engineering half way and did computer programming.
The knowledge would of been kind of useful to me nowdays!! ah well..
Fc = 1 / (2*PI*R*C)
So if I was to use a 0.25uF cap.. (and resistance of kdac is 3000ohm)
Fc = 1 / (2*3.14*3000*(0.25/1000000)) = 212hz .. meaning it is acting as a high pass filter with a cutoff of ~212hz.
And when I was using the 2.2uF caps that came with the dac
Fc = 1 / (2*3.14*3000*(2.2/1000000)) = 24hz .. so with this cap in place, the cutoff freq is ~24hz.
I am running the dac now with 0.25uF dearborn cap ( I thought wat the hell.. Ill try it.. no harm as there is no DC coming through to harm the speakers). Little to no bass response at all! It's rolling off really early.. eeep!
Am I on the right track?
So my next question is, what if we run say 10uF caps where the Fc = ~5hz. What happens to the sound then. I dont have any big around that value to try!