I'm currently sourcing out parts for a amp, and am pondering making a few mods - one of the issues with the design, apparently is a large DC offset on being switched on, and i was told by someone (who knows just about enough electronics to be dangerous) that a coupling capasitor might be a good idea. I'm considering my options and i'd like to understand the practical aspects of it and the advantages and disadvantages of various setups.
I get that RC needs to be as large as possible, and to me, since most common caps are in the microfarad range having a large resistor makes sense to me - if i have a 1megaohm resistor i'd only need a >> 0.05 uf cap (I think). On the other hand, i've noticed many builders seem to favour very large caps - so i'm wondering if there's any problem with using large resistors that isn't obvious from the math.
