It's easy enough just to accurately set the bias on the amp so that the DC offset is very low. I easily adjusted my bal. M^3 to less than 0.5mV offset at full volume, I'm sure the builders of high end direct coupled amplifiers do the same thing. Unless your source has a high DC offset, it won't be any issue, and it's better not to have the capacitor in the signal path.
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They gave me his photo, threw me in a pizza oven, called it a "pod", and told me to wing it
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