So, I’ve been trying to figure out the value of the output couplers on my Xiang Sheng DAC-01a and there are no schematics available anywhere and the ones that are installed are very difficult to read... Anyway, I ran across a formula based on the input impedance of the amp downstream from the DAC. It is, as I understand: C=1/2 (pi) (hertz at roll off) (input impedance) So if I have an amp with resistance of 30K ohms, and I want to roll off around 8 hertz, my output couplers should be 376,800 what? uf, nf, pf? Or is this even close to right?