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Welcome! Need support, you got it. Or share youe ideas and experiences.

But there is no regulation for the DAC ...

on the power supply board.

I got one of the "wrong" boards to compare to the Allen Wright Shunt Regulator.

From what I can see there is simply rectified and capacitor filtered DC going to the DAC board.

I would be REALLY surprised that this simple supply would outperform that BIG battery. Was there any capacitance across the terminals?
Was the battery tired?

Maybe, another favorite audio "truth" is a myth. Wouldn't be the first time. Sure would make life easier!


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