On Tue, 15 Jul 2003 21:26:05 -0400, "Arny Krueger"
wrote:

"Don Pearce" wrote in message

On Mon, 14 Jul 2003 09:12:51 +0100, Jim Lesurf
wrote:

Do people still use electrolytics as signal path coupling caps these
days in 'audiophile' equipment? I know that other types show charge
storage effects, but this should, I hope, not be audible with decent
designs handling musical signal patterns.

Plot the AC signal path of an amplifier's output stage and you will
find that the supply decoupling electroloytics are in series with the
speaker - they function as speaker coupling caps. I am not aware of
any design that has done away with this topology yet.

It makes a big difference whether the caps are inside or outside the
feedback loop.

Doesn't change the fact that they couple current into the speakers.
And of course everything, including the speakers themselves, is inside
the feedback loop.

d

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