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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

I'm still concerned that the circuit topology may have been changed.

Your sonic description suggests the mod resulted in a lot more distortion, not just a subtle shift in tonal balance or character.

If all the new resistors are shunts to ground, the original volume control must have only used two of its three terminals and there must be a series resistor between the previous stage output and the input to the volume control. Otherwise, the modified preamp volume control circuit is now different and may be overloading the previous stage.


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