[sdiy] DC blocking caps on inputs - or not?

[Richie Burnett]

Tom W wrote:

> 10K is a bit low, but with 470n, you still get a -3dB point at 30Hz. 
> That's still probably low enough for a lot of (most?) applications.

Paul M wrote:

> If you don't *HAVE* to use caps in the audio path, don't.
> Everything you put in the path affects the signal, so the less you can put 
> in the path, the less the signal is messed with.

Agreed. Even if the amplitude loss at 20Hz isn't too bad, undersized 
coupling capacitors still cause significant phase-lead at higher 
frequencies. If a signal passes through several undersized coupling 
capacitors throughout the audio chain the phase of the bass end of the 
spectrum can get quite messed up.

-Richie,