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If you must slopamp, enhance the experience

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The idea is to force the output stage of the [monolithic] slopamp out of class AB and into class A mode, by pulling sufficient current to cut off one side of the output stage and keep the other side cooking enough, but not too much. Works well from a technical standpoint, provided the output stage dissipation is set within reasonable limits, and lowers thermal tails [or memory effect] in the input and gain stages of the opamp, by providing a local thermal bath.
From a perceptual standpoint, most monolithic slopamps have enough other issues IMHO that there are diminishing returns. But worth the effort if within the constraints of keeping the same topology and not doing a more radical redesign. Generally, any audio function that uses opamps can be implemented without them, often with spectacular improvements, although more expensively, and therefore not appropriate as a mass consumer item. But for DIY, who cares about production issues?

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  • If you must slopamp, enhance the experience - wildmonkeysects 21:21:54 03/22/01 (0)


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