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Phase Shift

The problem with this circuit isn't so much undesired signal amplitude at the grid. Rather, it's the phase shift imparted by the RC. Any decoupling value of 1uF or less will create phase shift at the grid that is roughly 90 degrees throughout much of the vocal range. Whatever the amplitude, the lower section of the splitter will be modulated by this out-of-phase signal. The result is output that's smeared and lacking in definition. This type of splitter is a good topology to avoid in any high-end amplifier.



Edits: 08/02/17
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