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In Reply to: RE: Small is relative... posted by Steve O on March 18, 2015 at 15:13:27
"0.1uf/100K/1K at finals for fc~16Hz"
This seems preferable to me also, but it does raise the issue of low frequency phase shift. I'm skeptical as to whether such shifts are audible, but many DIY audiophiles do whatever they can to minimize the effect. There's definitely a conflict of interest in resolving the problem.
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...can be significantly reduced thru judicious use of negative feedback. See attached plot from D.T.N Williamson's article in Wireless World. I'd also predict LF "ringing" @ 1-2Hz based on this plot. The circuit this plot is derived from has a tc ratio of about 1:1, much less than the 10:1 rule of thumb.
I love the way it goes through a 180 deg shift at about 2 Hz. I can practically hear the OPT screaming for mercy... :)
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